Questions Asked on
February 22, 2012

  1. chemistry

    At a given temperature, you have a mixture of benzene (vapor pressure of pure benzene = 745 torr) and toluene (vapor pressure of pure toluene = 290 torr). The mole fraction of benzene in the vapor above the solution is 0.590. Assuming ideal behavior,

    asked by renee
  2. Physics

    In a game of basketball, a forward makes a bounce pass to the center. The ball is thrown with an initial speed of 4.3 m/s at an angle of 15 degrees below the horizontal. It is released 0.80m above the floor. What horizontal distance does the ball cover

    asked by Priscilla
  3. Physics

    An astronaut is inside a rocket that is blasting off vertically from the launch pad. You want this rocket to reach the speed of sound (331 m/s) as quickly as possible, but you also do not want the astronaut to black out. Medical tests have shown that

    asked by Jen
  4. science

    a =vf-vi/t is the equation for calculating the acceleration of an object. Write out the relationship shown in the equation, using words.

    asked by Milli
  5. chem11

    Suppose you have a large supply of sponge balls with weights in the centre, so that when the balls are piled on each other the bottom ones are flattened. Sketch a graph that generally describes mass vs. volume for these sponge balls. Also, would weighted

    asked by girl
  6. algebra

    A cylinder has a radius of 4x + 2 and a height of 5x + 4. Which polynomial in standard form best describes the total volume of the cylinder? Use the formula v = pi r^2 h for the volume of a cylinder.

    asked by jared
  7. Physics

    In a water park, people walk a distance of 20 meters up an inclined ramp before getting on a water slide. If the spot from where they start sliding down is located 7 meters above the water’s surface, calculate the angle of the ramp with the horizontal.

    asked by Lauren01
  8. Chemistry

    If 150.0 grams of iron at 95.0 degrees Celcius, is placed in an insulated container containing 500.0 grams of water at 25.0 degrees Celcius, and both are allowed to come to the same temperature, what will that temperature be? The specific heat of water is

    asked by Chloe
  9. geometry

    Assume triangle JKL is in the first quadrant, with the measure of angle K = 90°. Suppose triangle JKL is a 30°-60°-90° triangle and segment JK is the side opposite the 60° angle. What are the approximate coordinates of point L? j(2,7) k(2,2) a(4.9,2)

    asked by steve
  10. Physics

    Three identical charges of 2.0 uC are placed at the vertices of an equilateral triangle, 0.15m on a side. Find the net force acting on each angle.

    asked by Brandon
  11. Physics

    A train moving at a constant speed on a surface inclined upward at 10.0° with the horizontal travels a distance of 400 meters in 5 seconds. Calculate the vertical velocity component of the train during this time period.

    asked by Lauren01
  12. physics

    A "swing" ride at a carnival consists of chairs that are swung in a circle by 12.0 m cables attached to a vertical rotating pole, as the drawing shows. (θ = 61.0°) Suppose the total mass of a chair and its occupant is 196 kg. the tension is 3961.97N Find

    asked by Natasha
  13. Physics

    Two water jets are emerging from a vessel at a height of 50 centimeters and 100 centimeters. If their horizontal velocities at the point of ejection are 1 meter/second and 0.5 meters/second respectively, calculate the ratio of their horizontal distances of

    asked by Lauren01
  14. Math

    Assume that there are 7 different issues of Newsweek, 8 different issues of Time, and 4 different issues of Sports Illustrated, including the December 1st issue, on the rack. You choose 4 of them at random. What is the probability that you choose at least

    asked by victoria
  15. Physics

    A ball is ejected to the right with an unknown horizontal velocity from the top of a pillar that is 50 meters in height. At the exact instant, a carriage moving on rails is also released to the right from the bottom of the pillar. Calculate the velocity

    asked by Lauren01
  16. physics

    A ball is released from a tower at a height of 100 meters toward the roof of another tower that is 25 meters high. The horizontal distance between the two towers is 20 meters. With what horizontal velocity should the ball be imparted so that it lands on

    asked by Lauren01
  17. Precalculus

    A wheel rolling at a constant speed has a radius of 15 inches and takes 30 seconds to roll 100 feet along the ground. What is its angular velocity? Use 3.14 for pie, and solve to two decimal places.

    asked by Liz
  18. Physics

    If the vertical component of velocity for a projectile is 7.3 meters/second, find its hang time. A. 1.9 seconds B. 2.5 seconds C. 5.6 seconds D. 6.7 seconds E. 7.1 seconds

    asked by Lauren01
  19. physics

    A point charge with a charge of q1=2.60uC is held stationary at the origin. A second point charge with charge q2=-4.70uC moves from the point. x=0.140m, y=0 to the point x=0.230m, y=0.290m How much work is done by the electric force on q2?

    asked by Celine
  20. Chemistry

    What mass of oxalic acid dihydrate , H2C2O4•2H2O, is required to prepare 220.0 ml of a 1.28 M solution of oxalic acid ?

    asked by Cynthia
  21. math

    Big Sky Mining Company must install $1.5 million of new machinery in its Nevada mine. It can obtain a bak loan for 100% of the purchase price, or it can lease the machinery. Assume the following facts apply: a) The machinery fall s into the MACRS-3year

    asked by Peaz
  22. physics

    Janet wants to find the spring constant of a given spring, so she hangs the spring vertically and attaches a 0.42 kg mass to the spring's other end. If the spring stretches 4.0 cm from its equilibrium position, what is the spring constant?

    asked by McKenzie
  23. Physics

    A Martian rover is moving up a hill sloped at 30.0° with the horizontal. If it has a constant velocity of 1.50 meters/second, calculate its vertical displacement after 21.0 seconds.

    asked by Lauren01
  24. Early American Literature

    I had to read an excerpt from Ralph Waldo Emerson's "Self-Reliance". My assignment is to answer uestions about it. The uestion I am stumped on is: How important is Emerson's use of the adjective "foolish" in his discussion of consistency?

    asked by Whitney
  25. Chemistry

    HELP PLEASE the volume of a sample of oxygen is 200.0ml when the pressure is 3.00atm and the temp is 37.0 C. What is the new temp if the volume increases to 400.0ml and the pressure decreases to 2.000 atm?

    asked by Kalei
  26. Physics

    A ball thrown horizontally from an apartment balcony hits the ground in 5 seconds. If the horizontal velocity of the ball is doubled, how long will it take to hit the ground?

    asked by Lauren01
  27. chemistry

    At some other temperature, a solid sample of Ca(OH)2 is shaken with 0.0100 M CaCl2. Once equilibrated, some solid Ca(OH)2 remains undissolved. The solution is filtered and a 20.00 mL sample requires 38.80 mL of 0.0100 M HCl to neutralize it. Calculate the

    asked by Anonymous
  28. Chemistry

    In basic solution, H2O2 oxidizes Cr+3 to Cro4^-2 and is reduced to OH-. What is the balanced equation?

    asked by Cynthia
  29. physics

    A rectangle has a length of 2d and a height of d. Each of the following three charges is located at a corner of the rectangle: +q1 (upper left corner), +q2 (lower right corner), and -q (lower left corner). The net electric field at the (empty) upper right

    asked by Daniel
  30. physics

    A metal rod is 40.125 cm long at 20 °C and 40.148 cm long at 35 °C. calculate the coefficient of linear expansion of the rod for this temperature range.

    asked by selena
  31. Physics

    The hypotenuse of a right triangle is 29.0 centimeters. The length of one of its legs is 20.0 centimeters. What is the length of the other leg?

    asked by Lauren
  32. Economics

    Consider an economy with the following aggregate demand(AD) and aggregate supply(AS) schedules. These schedules reflect the fact that, prior to the period we're examining, decisions makers entered into contracts and made choices anticipating that the price

    asked by Andrew
  33. statistics

    A manufacturer of cell phones has decided that an assembly line will be considered to be operating satisfactorily if less than 0.02% of the phones produced per day are defective. To check the quality of a day's production, the company decides to randomly

    asked by Alyssa
  34. geometry

    Assume triangle JKL is in the first quadrant, with the measure of angle K = 90°. Suppose triangle JKL is a 45°-45°-90° triangle and segment JK is one of the legs. What are the coordinates of point L?

    asked by willy
  35. geometry

    Find the lateral area of a regular hexagonal pyramid with base edge of 10 in and lateral edge of 13 in.

    asked by Piggy
  36. chemistry

    Common ion effect;At some other temperature, a solid sample of Ca(OH)2 is shaken with 0.0100? Common ion effect;At some other temperature, a solid sample of Ca(OH)2 is shaken with 0.0100 M CaCl2. Once equ? At some other temperature, a solid sample of

    asked by Mahi
  37. physics

    A commuter airplane starts from an airport and takes the route shown in the figure below. The plane first flies to city A located 175 km away in a direction 30.0° north of east. Next, it flies for 150 km 20.0° west of north to city B. Finally, the plane

    asked by micheal
  38. chemistry

    A solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC (assuming ideal

    asked by renee
  39. Physics

    A bicyclist moving at a constant speed takes 10.0 seconds to travel 500 meters down a path inclined 30.0° downward from the horizontal. What is the vertical velocity of this motion?

    asked by Lauren01
  40. chemistry

    Calculate the concentration in ppm if 8 grams of CaCl2 is dissolved in 250 ml of water.

    asked by Emmee
  41. geometry

    Assume triangle JKL is in the first quadrant, with the measure of angle K = 90°. Suppose triangle JKL is a 45°-45°-90° triangle and segment JK is one of the legs. What are the coordinates of point L?

    asked by willy
  42. history

    who is considered the primary author of the declaration of independence

    asked by sammie doodles :-)
  43. chemistry

    Assuming additive volumes, what will be the molarity of the solution that results when 35.5 mL of 2.00 M HNO3 is added to 214.5 mL of water? 0.284 M

    asked by krystal
  44. chemistry

    What is the new pressure of 150ml of a gas that is compressed to 50ml, when the orginal pressure was 3.0atm?

    asked by Micki
  45. Chemistry

    The concentration of Pb+2 in a sample of wastewater is to be determined by using gravimetric analysis. To a 100.0-mL sample of the wastewater is added an excess of sodium carbonate, forming the insoluable lead(II)carbonate (267.2092 g/mol) according to the

    asked by Cynthia
  46. chemistry

    Calculate the mass of solute of hydrogen peroxide in a 35% solution if 450 ml of solution is being used

    asked by Emmee
  47. Chemistry

    A student must prepare 2.00 L of 0.100 M Na2CO3 (106 g/mol) Which is the best procedure for preparing this solution ?

    asked by Cynthia
  48. physic

    A projectile is fired from the origin (at y = 0s m) a shown in the figure. The initial velocity components are v 0x = 940 m/s and v 0y = 96 m/s. The projectile reaches maximum height at point P, then it falls and strikes the ground at point Q. In Fig. 3.1,

    asked by mark
  49. physics

    A child swings on a playground swing. How many times does the child swing through the swing's equilibrium position during the course of 3 period(s) of motion

    asked by Kasey
  50. Pre-Cal (polynomials)

    what is the general relationship between the degree of a polynomial function and the number of "bends" or relative maximum and minimum points in the graph?

    asked by Lauren
  51. statistics

    a teacher decides to fail 25% of the class.Examination marks are roughly normally distributed w/a mean of 72 & standard deviation of 6. what mark must a student make to pass?

    asked by mike
  52. Physics

    If the vertical component of velocity for a projectile is 7.3 meters/second, find its hang time. A. 1.9 seconds B. 2.5 seconds C. 5.6 seconds D. 6.7 seconds E. 7.1 seconds

    asked by Lauren01
  53. Chemistry

    How many liters of chlorine gas can be produced when 0.98 L of HCl react with excess O2 at STP?

    asked by Billy
  54. chemistry

    Calculate the mass of solute in a 10% salt solution if the mass of the solvent is 350 grams.

    asked by Emmee
  55. Chemistry

    Determine the mass of a nonvolatile, nonionizing compound that must be added to 4.68 kg of water to lower the freezing point to 98.70oC. The molar mass of the compound is 50.0 g/mol and the Kf for water is 1.86oC kg/mol. Ignore significant figures for this

    asked by renee
  56. Chemistry

    How many liters of chlorine gas can be produced when 0.98 L of HCl react with excess O2 at STP?

    asked by Billy
  57. phyics

    For a given launch velocity, at which launch angle does the projectile undergo the maximum horizontal displacement?

    asked by Lauren01
  58. physics

    A stone with mass m = 2.3 kg is thrown vertically upward into the air with an initial kinetic energy of 190 J. The drag force acting on the stone throughout its flight is constant, independent of the velocity of the stone, and has a magnitude of 2.3 N.

    asked by Katie
  59. Physics

    the charges an coodinates of two points charges located in x-y palne are : q1=+3*10^-6 C ; x=+3.5 cm . y=+0,5 cm and q2=-4*10^ -6 C; x= - 2 cm y=+1.5 cm . (a)Find the electric potential at the origin(b)How much work must be done to locate these charges at

    asked by Jc
  60. geometry

    Assume triangle JKL is in the first quadrant, with the measure of angle K = 90°. Suppose triangle JKL is a 45°-45°-90° triangle and segment JK is one of the legs. What are the coordinates of point L? j(2.7) point k(2,2) point and the answers are,

    asked by willy
  61. physics

    Joe has a weight of 850 N (about 193 lb) when he is standing on the surface of the Earth. What would his weight (the gravitational force due to the Earth) be if he tripled his distance from the center of the Earth by flying in a spacecraft?

    asked by Mina
  62. statistics

    in 1000 tosses of a coin, 560 heads & 440 tails appear. is it reasonable to assume that coin is fair.

    asked by ABC
  63. college physic

    Liquid helium is stored at its boiling point temperature of 4.2K in a shperical container(r=0.30m).The container is a perfect blackbody radiator.The container is surrounede by a sherical shield whose temperature is 77k.A vacuum exists in the space between

    asked by noah
  64. physics

    In an automatic clothes dryer, a hollow cylinder moves the clothes on a vertical circle (radius r = 0.31 m), as the drawing shows. The appliance is designed so that the clothes tumble gently as they dry. This means that when a piece of clothing reaches an

    asked by Natasha
  65. Chemistry

    A 30.00-mL sample of weak acid is titrated with 0.0167 M NaOH. At the endpoint , it is found the 40.35 mL of titrant was used. What was the concentration of the weak acid ?

    asked by Cynthia
  66. physics

    A young boy swings a yo-yo horizontally above his head at an angular acceleration of 0.42 rad/s2. If the string is 0.55 m long, what is the tangential acceleration of the yo-yo?

    asked by Anonymous
  67. Chemistry

    How many liters of chlorine gas can be produced when 0.98 L of HCl react with excess O2 at STP?

    asked by Billy
  68. Economics

    Consider an economy with the following aggregate demand(AD) and aggregate supply(AS) schedules. These schedules reflect the fact that, prior to the period we're examining, decisions makers entered into contracts and made choices anticipating that the price

    asked by Andrew
  69. physics

    A 0.40-kg block slides along a small track with elevated ends and a flat central part. The flat part has a length L = 1.84 m. The curved portions of the track are frictionless, but for the flat part the coefficient of kinetic friction is 0.132. The block

    asked by Katie
  70. Chemistry

    How many grames of lithium nitrate LiNO3 (68.9 g/mol) are required to prepare 174.1 mL of a 0.698 MLiNO3 solution ?

    asked by Cynthia
  71. College Chemistry

    C6H6(l) + Cl2(g) --> C6Cl6(s) + HCl(g) Consider the unbalanced equation above. What is the maximum mass of each of the products that can be formed when 72.5 g of C6H6 and 49.0 g Cl2 react?

    asked by Jade
  72. Math (ASAP)

    Carolyn and Kim are selling lemonade this summer.  *It costs $0.10 to make each cup of lemonade.  *They are going to sell each cup of lemonade for $0.25. What is the least number of cups of lemonade they need to sell in order to collect $10.00 more

    asked by Frances
  73. Macro econ

    How might a “perfect” macro equilibrium be affected by (a) a stock market crash; (b) the death of a president; (c) a recession in Canada; (d) a spike in oil prices?

    asked by Yokka
  74. geometry

    The perimeter of parallelogram CDEF is 54 centimeters. Find the length of segment FC if segment DE is 5 centimeters longer than segment EF. (Hint: Sketch and label a diagram first.) a)14 b)44 c)16 d)11

    asked by steve
  75. math

    Joes electric made 19 customer calls last week and 24 calls this week, How many calls must be made next week in order to maintain an average of at least 21 calls per week for the three week period?

    asked by ann
  76. Physics

    A thin condicting spherical shell of outer radius 20cm carries a charge of +3 muC. Sketch (a) magnitude of the electric field E and (b) potential V versus the distance r from the center of the shell.

    asked by Jc
  77. Science

    Why is only one egg produced during oogenesis while four sperm are produced during the parallel process of spermatogenesis?

    asked by Rebecca
  78. physics

    A girl delivering newspapers covers her route by traveling 10.00 blocks west, 4.00 blocks north, and then 5.00 blocks east.

    asked by micheal
  79. Chemistry

    Using the "octet rule" write the Lewis formulas for NF3 and NO3-.

    asked by Chem
  80. Honors Physics

    A lumberjack (mass = 98 kg) is standing at rest on one end of a floating log (mass = 290 kg) that is also at rest. The lumberjack runs to the other end of the log, attaining a velocity of +3.1 m/s relative to the shore, and then hops onto an identical

    asked by Elizabeth
  81. physics

    A Chinook (King) salmon (Genus Oncorynchus) can jump out of water with a speed of 5.95 m/s. (See Problem 4.9, page 111 for an investigation of how the fish can leave the water at a higher speed that it can swim underwater.) If the salmon is in a stream

    asked by micheal
  82. Chemistry

    A student must prepare 2.00 L of 0.100 M Na2CO3 (106 g/mol) Which is the besst procedure for preparing this solution ?

    asked by Cynthia
  83. geometry

    Umberto's mother expects an increase of 5% in her current salary of $36,000. What would her new salary be?

    asked by Merid
  84. Physics

    1. Explain how the ff. works: a. ultrasound imaging device b. photocopying machine c. microwave oven Thank you so much in advance! :)

    asked by Cady
  85. statistics

    Find the number z that satisfies the proportion of the observations in a standard normal distribution less than z is 30%?

    asked by Ashley
  86. Physics

    I cant figure this problem out and it's asking for the value and units for the force. Please help me! A 5.25 kg crate is suspended from the end of a short vertical rope of negligible mass. An upward force F(t) is applied to the end of the rope, and the

    asked by Cede
  87. chemistry

    How many grams of CaO (56.08) are required for complete reaction with HCl (36.46) in 275 mL of a 5.90 M HCl solution? CaO + 2HCl --> CaCl2 + H2O.

    asked by Anonymous
  88. physics

    A Chinook (King) salmon (Genus Oncorynchus) can jump out of water with a speed of 5.95 m/s. (See Problem 4.9, page 111 for an investigation of how the fish can leave the water at a higher speed that it can swim underwater.) If the salmon is in a stream

    asked by micheal
  89. algebra

    Hi Dear Jiskha team, I have Algebra homework and I will need some help. The homework is following: Suppose you are using a computer to draw a face on a coordinate plane. The eyes are at (–3, 3) and (3, 3). The tip of the nose is at the origin. To make a

    asked by Lily
  90. science

    The somatic cells of a dog contain 78 chromosomes. Which of these is false? a) the diploid number is 78 b)the haploid number is 39 c) sperm produced by a dog contains 39 chromosomes d) a cell in metaphase of mitosis contains 78 chromosomes e) a cell in

    asked by Rebecca
  91. math

    jasmine bought 26 pieces of fruit.she bought 6 oranges.she bought twice as many apples as oranges,and twice as many oranges as bananas.she also bought some pears.

    asked by john
  92. Finance

    The Seneca Maintenance Company currently (that is, as of year 0) pays a common stock dividend of $1.50 per share. Dividends are expected to grow at a rate of 11 percent per year for the next 4 years and then to continue growing thereafter at a rate of 5

    asked by Raechelle
  93. Chemistry

    What is the net ionic equation for the reaction that occures between nitrouse acid and strontium hydroxide ?

    asked by Cynthia
  94. economics

    Complete the following table for the firm below which is selling its product in a perfectly competitive market and hiring labor in a perfectly competitive labor market. MARGINAL WORKERS TOTAL MARGINAL PRODUCT REVENUE HIRED PRODUCT PRODUCT PRICE PRODUCT 1

    asked by Anonymous
  95. probability

    George has a bag of marbles. Inside the bag are 5 red marbles, 3 red marbles, and 2 blue marbles. He draws out two marbles in a row, without replacement. What is the number of outcomes?

    asked by Piggy
  96. physics

    The string in the Figure is L = 135.0 cm long and the distance d to the fixed peg P is 94.5 cm. When the ball is released from rest in the position shown, it will swing along the dashed arc. How fast will it be going when it reaches the lowest point in its

    asked by Katie
  97. Physical Science

    If a hot iron ball is dropped into 200.0 gram of cooler waterthe water temperature increases by 2.0 celsius and the temperature of the ball decreases by 18.6 celsius. What is the mass?

    asked by Anonymous
  98. Physics

    When a 0.50 kg-object is attached to a vertically supported spring, it stretches 0.10 m from the equilibrium position. Find k for the spring.

    asked by Noel
  99. physics

    In preparing to shoot an arrow, an archer pulls a bowstring back 0.37 m by exerting a force that increases uniformly from 0 to 246 N. What is the equivalent spring constant of the bow?

    asked by Kasey
  100. physics

    A racetrack has the shape of an inverted cone, as the drawing shows. On this surface the cars race in circles that are parallel to the ground, and the surface is at an angle θ = 25°. For a speed of 27 m/s, at what value of the distance d should a driver

    asked by Natasha
  101. chemistry

    A water sample taken from the ocean is 36 ppt salt content. What is the mass of salt present in a liter of this ocean water? 36g

    asked by krystal
  102. Physics

    a small sphere whose m mass is 1.0 mg carries a charge q of 2.0*10^(-8)C. It hangs from a silk thread that makes an angle of 30 degrees with a large charged nonconducting sheet as in figure. Calculate the uniform charge density σ for the sheet

    asked by Jc
  103. Trig (Last URGENT)

    sin2x+cosx=0 , [-180,180) = 2sinxcosx+cosx=0 = cosx(2sinx+1)=0 cosx=0 x1=cos^-1(0) x1=90 x2=360-90 x2=270 270 doesn't fit in [-180,180) what do I do? Or maybe I did something wrong. sinx=1/2 x1=sin^-1(1/2) x1=30 x2=180-30 x2=150 is this correct? Please and

    asked by Anonymous
  104. PHYSICS help please

    Two small charged balls have a repulsive force of 0.12 N when they are separated by a distance of 0.85 m. The balls are moved closer together, until the repulsive force is 0.60 N. How far apart are they now?

    asked by Kayla
  105. Physical Science

    Balance this equation: I2+HNO3 = HIO3+NO2+H2O

    asked by Hannah
  106. math

    Assume that the playbook contains 10 passing plays and 12 running plays. The coach randomly selects 8 plays from the playbook. What is the probability that the coach selects at least 3 passing plays and at least 2 running plays?

    asked by victoria
  107. Geometry

    Umberto's mother expects an increase 5% increase in her current annual salary of $36,000. What would her new annual salary be?

    asked by Merid
  108. English 3

    Would tonight/night be an exact rhyme or a slant rhyme? And is begin/him a slant rhyme? Thanks -MC

    asked by mysterychicken
  109. Math

    One-third of a number, decreased by thirty-six, is at most twenty-two. Find the number. Please help me

    asked by Lisa
  110. math

    If 9x8=72, then 72 divided by 8 is what number? Explain how you know without actually finding the quotient?

    asked by rosemary
  111. chemistry

    25.6 {\rm mL} of ethanol (density =0.789 {\rm g}/{\rm mL}) initially at 8.0^\circ {\rm C} is mixed with 39.5 {\rm mL} of water (density = 1.0 {\rm g}/{\rm mL}) initially at 23.1^\circ {\rm C} in an insulated beaker. Assuming that no heat is lost, what is

    asked by MD
  112. trig

    How king i find theta if the formula is cot(2theta) = 7/24?

    asked by Isai
  113. Statistics

    In a survey of 302 people, the following data were obtained relating gender to political orientation: Republican (R) Democrat (D) Independent (I) Total Male (M) 85 43 37 165 Femal (F) 43 79 15 137 Total 128 122 52 302 What is the probability that the

    asked by Brianna
  114. physics

    A spring with a spring constant of 1.33 102 N/m is attached to a 1.6 kg mass and then set in motion. (a) What is the period of the mass-spring system? (b) What is the frequency of the vibration?

    asked by Kasey
  115. biology

    you are investigating a crime. someone has died as a result of a gun shot from far away. The suspect claims that it couldn't have been him because he was with the victim at the time of the murder. they were in a restaurant eating pasta. how could you test

    asked by sarry
  116. BIOLOGY

    The doubling time of a type of bacteria is 35 minutes. If every bacterium reproduces, then after 35 minutes a population of 64 bacteria will have grown approximately to what size?

    asked by STORMY
  117. MAT 116

    Find the slope-intercept equation of the line that has the given characteristics. Slope 8.7 and y-intercept (0,-6)

    asked by May
  118. Math/Calculus.

    Suppose (x^2)*(e^(-2y))= ln(xy) Find dy/dx by implicit differentiation.

    asked by Bob
  119. physics

    how much force is needed to accelerate a 1800 kg car 3m/s 2

    asked by Orianna
  120. calculus

    1.) values of f(t) are given in the following table: t 0 2 4 6 8 10 f(t) 137 112 88 68 49 34 a. Does this function appear to have a positive or negative first derivative? Second derivative? * I think both derivatives are negative b. Estimate (f prime) f^'

    asked by JJ
  121. college physic

    A solid cylindrical rod made from a center cylinder of lead and an outer concentric jacket of copper.Except for its ends,the rod is insulated,so that the loss of heat from the curved surface is negligible.When a temperature difference is maintained between

    asked by noah
  122. Math

    Tanya had $1.19 in coins. None of the coins were dollars or 50-cent pieces. Josie asked Tanya for change for a dollar, but she did not have the correct change. Which coins did Tanya have

    asked by Elaina
  123. CHEM

    Why are gamma rays generally not shown when writing nuclear equations ?

    asked by TJ
  124. geometry

    The surface area to volume ratio of a cube is 2 to 5. Find the length of each side.

    asked by Piggy
  125. pysics 1

    You ride your bike along a straight line from your house to a store 1030 m away. On your way back, you stop at a friend's house which is halfway between your house and the store. a) What is your displacement? Tries 0/5 b) What is the total distance

    asked by jelena pleeease help
  126. algebra

    you are planning a rectangular dining pavilion. its length is three times its width. you want a stone walkway that is 3 ft wide around the walkway. what should the dimensions of the pavilion be?

    asked by Anonymous
  127. Math

    heather has $2.50 in nickels, dimes, and quarters. she has 3 times as many nickels as dimes and four times as many quaters as dimes

    asked by pete
  128. chemistry

    A solution is made by adding 0.100 mole of ethyl ether to 0.841 mole of ethyl alcohol. If the vapor pressure of ethyl ether and ethyl alcohol at 20oC are 375 torr and 20.0 torr, respectively, the vapor pressure of the solution at 20oC (assuming ideal

    asked by renee
  129. Trig Help

    Given that cos2x=7/12 and "270 equal or < 2x equal or < 360", find sinx. Please help and Thank you

    asked by Anonymous
  130. chemistry

    Calculate the mass of solvent that would contain 3.0 mg of a drug if the concentration was 3.5%

    asked by Emmee
  131. Chemistry

    Silver(I) nitrate and sodium sulfate react to form silver(I) sulfate and sodium nitrate. Suppose 45.98 mL of 0.060 M silver(I) nitrate solution and 26.64 mL of 0.10 M sodium sulfate solution are mixed. What is the maximum number of grams of silver(I)

    asked by Jade
  132. Calculus

    An object moves in a straight line. Its velocity, in m/s, at time t is v(t)=4t^2/(4+t^3), t>(greater or equal)0. Determine the maximum and minimum velocities over time interval 1

    asked by Jake
  133. Chemistry

    Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 18.9 g of biphenyl in 26.4 g of benzene?

    asked by Josh
  134. business

    Which should NOT be included as a heading in a chronological résumé? “Experience” if you only have one item to list under this heading “Education and Experience”, because these two items should be listed separately “Honors and Awards”,

    asked by Anonymous
  135. PHYSICS

    A free electron and a free proton are exactly 1.0 com apart. Find the magnitude and direction of (a) the acceleration of the proton and (b) the acceleration of the electron.

    asked by Kayla
  136. principles of physics

    Calculate the change in potential energy of 7.8 million kg of water dropping 50 m over Niagara Falls.

    asked by britches
  137. physics

    A hot-water heater is operated by solar power. If the solar collector has an area of 5.8 m2 and the power delivered by sunlight is 550 W/m2, how long will it take to increase the temperature of 1.0 m3 of water from 24°C to 59°C?

    asked by halley
  138. Physics

    A car with a mass of 1380 kg is moving around a curve with a radius of 50 m at a constant speed of 25 m/s (about 56 MPH). (a) What is the centripetal acceleration of the car? 1 m/s2 (b) What is the magnitude of the force required to produce this

    asked by Mina
  139. physics

    A hot air balloon is hovering at an altitude of 6000 meters. The pilot decides that it is time to descend and turns off the balloon's burners. Once the balloon reaches the ground, the gas inside the balloon occupies 980 m^3 and is at atmospheric pressure.

    asked by RENEE
  140. ECONOMICS

    Grocery stores and gasoline stations in a large city would appear to be examples of competitive markets: There are numerous relatively small sellers, each seller is a price-taker, and the products are quite similar. a. How could we argue that these markets

    asked by YOULANDA
  141. Business Math

    Model the data using an exponential function f(x) = Ab^x. x ,0 ,1 ,2 f(x) ,800 ,480 ,288 Like 800-480=320 and 480-288=192 How do I find the exponential form? Thank you.

    asked by Angel
  142. biology tutor on jiskha

    i post my biology questions here today and few days ago no teacher reply. there not any biology tutor on here?

    asked by Shreya
  143. To Ramon - English

    I removed your latest post because it included too much personal information about you. Do not post the name of your school or your last name. Please see my questions about your question below.

    asked by Ms. Sue
  144. prealgebra

    how do you solve this problem and can you help me please: wholesale price: $13 and markup percent: 110% can u help please

    asked by vick
  145. Psychology

    The means of travel within and between neurons is different becuase: a. eletrial signals move impulses within the neuron, while chemical signals move the impulses between neurons. b. chemical signals move the impulses within the neuron, while electrical

    asked by Deb
  146. chemistry

    How many milliliters of 0.729 M NaOH are needed to prepare 150.0 mL of 0.122 M NaOH? 25.1 mL

    asked by krystal
  147. trig

    please help me with some questions I skipped on a review for our test coming up? solve 5-7 on the interval 0 greater than or equal to x less than or equal to 2pi. 5. sin x=sqrt3/2 6. cos x=-1/2 7. tan x=0 ---------------- 14. what is the exact value of

    asked by BreAnne
  148. Science/geology

    Why does the Red River flow north, and the Mississippi River flow south??

    asked by Lee
  149. chemistry

    A sample of a gas in a ridge container at 30.0 c has a volume of 2.00L. If its temp increased to 40.0 C What will the new volume be?

    asked by levi
  150. Physics

    A satellite moves on a circular earth orbit that has a radius of 6.4 106 m. A model airplane is flying on a 23-m guideline in a horizontal circle. The guideline is parallel to the ground. Find the speed of the plane such that the plane and the satellite

    asked by Natasha
  151. Pre-Cal (polynomials)

    How does the degree of a polynomial function affect the end behavior?

    asked by Lauren
  152. consumer math

    6. These items were on Cyril's last credit card statement. Last Balance Payment Periodic Rate New Charges $567.18 $120.00 1.56% $45.17 What is his new balance? (Points : 1)

    asked by josh
  153. english

    Hi is my thesis statement clear in the following paragraph, if nto how can i make it clearer. Basically I want to show that music programs can positively impact a students education, so music programs shouldn't be cut. Also should I keep out all the

    asked by jon
  154. physics

    A golfer takes two putts to get his ball into the hole once he is on the green. The first putt displaces the ball 8.10 m east, the second 6.00 m south. What displacement would have been needed to get the ball into the hole on the first putt?

    asked by micheal
  155. Chemistry

    How do you draw a lewis dot structure of s3o

    asked by Chem
  156. US HISTORY

    what laws were passed because of temperance movement. Or what did the government do because of the temperance movement (Prohibition era). Thanks!

    asked by DAN
  157. College Geology

    assume that a particular radioactive-isotope has a half-life of 100 million years. Also assume that the parent isotope is incorporated into the minerals found in igneous rocks and that the only daughter atoms in the rock formed from the decay of the parent

    asked by Rob
  158. History

    What was the non-importation movement? Is this right? What does no taxation without representation mean? We will only pay taxes that our representatives in a House or Assembly [or similar body] have approved and passed into a law

    asked by Cara
  159. probability

    There are 12 CD's in a bag -- 6 rap music, 3 country music, and 3 rock music. Two CD's are selected from the bag. The first CD is not replaced before making the second selection. What is the total number of possible out outcomes?

    asked by Piggy
  160. physics

    Find the length of a pendulum that oscillates with a frequency of 0.19 Hz

    asked by Kasey
  161. Physics

    A 0.495-kg mass is attached to a horizontal spring with k = 108 N/m. The mass slides across a frictionless surface. The spring is stretched 33.3 cm from equilibrium, and then the mass is released from rest. Find the speed of the mass when it has moved 4.79

    asked by Bradley
  162. Science

    what fraction of chlorine-36 remains undecayed agter 200,00 years?

    asked by Nick Ross
  163. Math

    The table shows the total number of emails that the Wright family received this morning Member Mr.Wright Mrs.Wright Cole Trinity Emails 7 8 3 3 Mr.Wright=7 emails Mrs.Wright=8 emails Cole=3 emails Trinity=3 emails If the family receives 7 more emails,which

    asked by J.C.
  164. math

    Three pennies are tossed into the air.What is the probability they will match either heads-heads-heads or tails-tails-tails when they land?

    asked by john
  165. Finance

    Piedmont Enterprises currently pays a dividend (D0) of $1 per share. This dividend is expected to grow at a 20 percent per year rate for the next 2 years, after which it is expected to grow at 6 percent per year for the foreseeable future. If you require a

    asked by Raechelle
  166. physics

    A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in medical laboratories, for instance, to cause the more dense red blood cells to settle through the less dense blood serum

    asked by Natasha
  167. algebra

    if the fence around a rectangular field is 3000 feet,write a relationship for the length l of the field and its w.

    asked by Anonymous
  168. chemestry

    Calculate [OH^ - ] for strong base solution: 14.0 mL of 1.20×10−2 M Ca(OH)_2 diluted to 430.0 mL.

    asked by chris
  169. Chemistry

    N2(g) + O2(g) --> N2O5(g) (a) Consider the unbalanced equation above. What is the maximum mass of N2O5 that can be produced when 43.0 g of N2 and 43.5 g O2 react?

    asked by Jade
  170. Math

    1. Start with an odd number, e.g. 3. Then the square of 3 can be expressed as the sum of two consecutive numbers, i.e. 32 = 9 = 4 + 5. Therefore the Pythagorean Triples are {3, 4, 5} since 32 + 42 = 52. Generate another set of Pythagorean Triples starting

    asked by Kevin
  171. math

    sam spent a total of 5 2/3 hours doing homework. Julia spent 5 5/6 hours doing homework. who spent more time on homework this week? explain

    asked by marshalena
  172. geometry

    leg xy of the right triangle is twice as long as leg yz. if the area of the triangle is 36cm to the second power what is the length icm of xy?

    asked by demetra
  173. college physic

    Liquid helium is stored at its boiling point temperature of 4.2K in a shperical container(r=0.30m).The container is a perfect blackbody radiator.The container is surrounede by a sherical shield whose temperature is 77k.A vacuum exists in the space between

    asked by noah
  174. Math

    How long will it take for the population of a certain country to double if its annual growth rate is 3.9%

    asked by Anonymous
  175. math

    Louis and his family are going to the zoo. The price of a bus ticket is $1.00, but the family has some coupons. If Louis pays full price, his wife pays 2/3 of the regular price, and the two children pay 1/2 of the regular price. How much will it cost for

    asked by Anonymous
  176. physics

    The driver of a 1300 kg car, initially traveling at 10.1 m/s, applies the brakes, bringing the car to rest in a distance of 16.5 m. (a) Find the net work done on the car. (b) Find the magnitude and direction of the force that does this work. (Assume this

    asked by Henry
  177. English

    Could you please tell me if the following verbs can take the -ing form in the examples below? I included a sentence I need to write in an email. 1) I'm smelling the perfume of the flowers. I'm testing a red wine. 2) I'm hearing him coming (I think you can

    asked by Henry2
  178. Pre-Cal (polynomials)

    Look at the right end behavior of each function )\(as x -> infinitey). what about the function determines whether its graph wil point up or down on the right-hand side?

    asked by Lauren
  179. physics

    When only the front wheels of an automobile are on a platform scale, the scale balances at 7.8 kN; when only the rear wheels are on the scale, it balances at 5.5 kN. What is the weight of the automobile? How far is its center of mass behind the front axle?

    asked by sara
  180. math

    Nathan owes Michael $5.00.Nate expressed how much he owes as an integer.Michael expressed how much Nate owes him as an integer.What do the two integers have in common?

    asked by bebe
  181. math

    sam spent a total of 5 2/3 hours doing homework. Julia spent 5 5/6 hours doing homework. who spent more time on homework this week?

    asked by marshalena
  182. Algebra

    So I'm working with polynomials: Find the value of x in the geometric shape. Area=144ð The radius is: (x+4)cm PLEASE HELP.D:

    asked by Poop.
  183. Biology Lab

    HOw much Nacl (MW= 58.44g) would you need to !@#$%^& to a solution if you wanted to make 100 ,mL of 4* 10 to the -3 M NaCl?

    asked by Amber
  184. highschool bio

    Cells are specialized in structure to match their function. Compare cell specialization in gametes with other examples of cell specialization.

    asked by joe
  185. physics

    How many joules of potential energy does a 1.5 kg book gain when it is elevated 4.2 m?

    asked by britches
  186. statistics

    Varsity team try out. Assume the distribution of heights to be normal w/a mean of 64inches & standard deviation of 4 inches. only 15 students passed. how many students joined the try out?

    asked by mike
  187. English

    Writeacher,I have a question on the sonnet I rephrased yesterday. I hope you can check it. "And summer's green all girded up in sheaves, Borne on the bier with white and bristly beard..." He sees the summer's crops tied (up is possible) in bales and taken

    asked by Henry2
  188. business

    A job application letter is effective in convincing the reader that an applicant is knowledgeable of the company by? a.)providing relevant evidence from what the applicant has done in the past to support claims that this person can do the job.

    asked by Anonymous
  189. geography

    1. What country is due south of Egypt? Sudan 2. Is Phnom Penh or Hanoi the capital of Vietnam? Hanoi 3. Besides the Soviet Union, what other country borders the world's largest lake? Iran 4. What river runs west to east across the northern part of Italy?

    asked by Reed
  190. business

    Which of the following should you NOT do in the close of a job interview A-Give a final explanation for a weakness that you have B-Show enthusiasm for the job C-Summarize your accomplishments and strengths D-smile and relax the answer is A the answer is A

    asked by Anonymous
  191. horizontal displacement physics

    how do we find horizontal displacement in physics?

    asked by lou
  192. math

    Susie drew a triangle with angles that measure 47, 43. and 90 degrees. What type of triangle did she draw?

    asked by Xavier
  193. English

    Could you please check if everything is OK? Thank you very much. 3) Put the following into indirect speech using a suitable reporting verb (10) 1) “Would you like to have dinner with me on Saturday?”, he said to me. He invited me to have dinner ... 2)

    asked by Henry2
  194. geometry

    The surface area and volume of a cube is the same numeric value. Calculate the side length.

    asked by Piggy
  195. pre algerbra

    direction use the given info to find the new amount wholesale price $13 and mark up percent 110% can you help me solve this please

    asked by steph
  196. math

    Factor completely: 36t^2 + 49 - 84t

    asked by Lisa
  197. Physics

    suppose that the charge on the electron and proton did not have the same magnitude but instead differed by one part in 10^10. What would be the net charge on a 1.0 kg sample of helium gas?

    asked by Luke
  198. statistics

    Assume that IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Assume 1000 freshmen took the test.

    asked by Anonymous
  199. chemistry

    How many liters of 0.101 m NaCl contains 1.70 mol of this salt? Assume this solvent is H2O. Answer in units of L I do not understand what i am looking for or how to solve for it. Steps would be appreciated.

    asked by kelly
  200. MATH

    √5sec²x-2secx=5 i have to solve this equation on the interval [0, 2π).

    asked by Katie
  201. Math

    Simplify each expression. Write answers using positive exponents. a. (7x^2y^3)(-2xy) b. (a^2b^3)^-1(a^2b^3) c.(-4m^3)^2

    asked by Amanda
  202. Geometry

    Use a paragraph proof to prove: if two lines and a transversal form corresponding angles that are congruent, then the two lines are parallel.

    asked by Anonymous
  203. English

    Could you please check if all the sentences are correct? Thank you. 1) To start with, I’ll have a tomato salad. I couldn’t help crying. I’m worried about Brian’s getting low marks at school. 2) He admitted eating all the biscuits. I couldn’t do

    asked by Henry2
  204. math

    The 2000 Paralympics (Parallel Olympics) were held in Sydney, Australia. Ticket sales for all events totaled over 1.11 × 106. Of the total ticket sales, 8.84 × 105 were sold as day passes, and 2.24 × 105 were sold as reserve seating for the opening and

    asked by sanyu
  205. Physics(2)

    A crane is holding a bloc of metal of 10 000kg. If the crane's arm weights 1000kg and is 10,0m long, what is the tension in cable a and how big is the force exerted on the pivot of the cranes arm. the cable passes through the top of the cranes arm and then

    asked by Raf
  206. math

    factor the trinomial. 1. m^2-7m-30 2. z^2+65z+1000 3.x^2-45x+450 4.d^2-33d-280

    asked by Janae
  207. ENGLISH ESSAY

    Could you plz help me to check if these two essays have thesis and thesis development? ESSAY 1:There has been much discussion over the maximum population capacity of our world today. This paper analyzes how agroecology has been a major benefit to society

    asked by Tianna
  208. Statistics

    Find t-value for sample size n = 16 and area to the right 0.10

    asked by Tina
  209. Algebra 1

    1. m^2 - 7m - 30 2. z^2 + 65z + 1000 3.x^2 - 45x + 450 4.d^2 - 33 d - 280

    asked by Janae
  210. computers

    what is a link from one thing to another used to enhance usability? I say interface

    asked by Elizabeth
  211. computers

    what would be redundant if added to the content of an e-mail? I say purpose of e-mail

    asked by Elizabeth
  212. math

    Ayita has the coupon shown below Buy 10 or more quarts of paint and take $8 off your total order Ayita will buy 12 quarts of paint. Each quart of paint cost $10.95. Which number sentence can be used to find how much Ayita will pay for the paint if she uses

    asked by Colton
  213. hcs/341

    What are five recruitment strategies or methods..need to create a matrix. thanks..

    asked by antrice
  214. Geometry

    Shelly, Susan, and Samantha are all working at an amusement park for the summer. The manager finds out that one of them left the key in the door to the security office. When he asked them who did it, they replied: Shelly: Samantha did it. Susan: Shelly did

    asked by Anonymous
  215. English

    What is the past tense of run

    asked by Jim
  216. APUSH help (ASAP)

    Explain the rise of the republicans and the international challenges faced following world war I?

    asked by Sonja
  217. Algebra

    Can you help me set this problem? it is as follows, "Find three consecutive odd integers such that their sum is 5 more than four times the larger."

    asked by jubillee
  218. Living ENvironment

    In a hydrolysis reaction (enzyme) the bonds in substrate are weakened right always

    asked by tracy
  219. business

    Which of the following is NOT recommended when considering or accepting a job offer A- Make your acceptance contingent on a written offer. B- Accept the position immediately if you are offered the job at the end of the job interview C-Notify other

    asked by Anonymous
  220. physical science

    find the mass of sodium chloride formed when 6.9g of sodium burns in a gas jar filled with chlorine gas.

    asked by winston
  221. social study

    What are some major turning point in vietnamese history leading up to world war 2

    asked by Alexis
  222. Calculus

    a ladder is 20 feet long and its top is slidding at a constant rate of 2 feet per second. How fast is the bottom of the ladder moving along the ground when the bottom is 16 feet from the wall?

    asked by Stacy
  223. Math

    Simplify each expression. Write answers in standard form. a. (4d-6)(-3d) b. 5g(g^2-2g+1) c. (-2q^2+q+3)-5(q^2+2q-1)

    asked by Amanda
  224. chemistry

    a 0.25-g sample of a liquid was vaporized at 100 degree celcius. the vapor occupied 125ml under a presure of 0.96 atm. what is the molecular weight of the liquid?

    asked by Tam
  225. statistics

    Sample with size n = 100 has mean = 30. Assuming the population standard deviation is 8, construct 95% confidence interval for population mean.

    asked by Tina
  226. chemistry

    If 19.7 g of CaCl2 are present in 200 mL of aqueous solution, what is the concentration in terms of the following? a. molarity 100 M CaCl2 b. weight/volume percent 0.1 % (w/v) c. parts per thousand 100 ppt d. parts per million 10E4 ppm e. parts per billion

    asked by krystal
  227. History

    Why did Jame Otis oppose writ of assistance?

    asked by Samantha
  228. English

    Here is the second exercise I'd like you to check. Thank you, Writeacher. 1.I am used to (read) __(reading)________till late. 2. The manager would like (speak) _(to speak)_________ to his secretary. 3. I remember (go) ___going_______ to primary school by

    asked by Henry
  229. business

    The interviewer wants to know why you got a D in all your English classes until this year, when you got a B. Your best response is A- “I had problems writing and never thought it was important. Then, I realized that it is important, so I got myself a

    asked by Anonymous
  230. business

    After the interview but before the job offer, it is NOT appropriate to A- phone the company you interviewed with. B-send a follow-up letter. C- inquire about the salary and benefits. D- respond to an e-mail query from the employer the answer is A OR B

    asked by Anonymous
  231. geometry

    The surface area of a right rectangular prism is 112 sq units. The height is twice the width. The length is 4 units more than the height . Find the volume.

    asked by Piggy
  232. division facts

    If 44/4=11, what is 44/11? Explain?

    asked by rosemary
  233. Math

    In a triangle the two larger angles differ by 10 degree. The smaller angle is 50 degree less than the largest angle. Find the measure of each angle. Just searching help on how to set it up.

    asked by Scott
  234. US HISTORY

    describe the Indian Removal Act of 1830

    asked by sammie doodles :-)
  235. business

    Today many employers expect interviewees to do more than just answer standard questions including all of the following except .defer to the hiring company to take control of the interview process B.provide samples of work they woukd likey do in the job.

    asked by Anonymous
  236. Animal Behavior

    If someone could give me an example of when developmental homeostasis works in an animal, and when it doesn't. Thanks!!!

    asked by Jessica
  237. Math

    How to Generate Pythagorean Triples using an Odd Number 1. Start with an odd number, e.g. 3. Then the square of 3 can be expressed as the sum of two consecutive numbers, i.e. 32 = 9 = 4 + 5. Therefore the Pythagorean Triples are {3, 4, 5} since 32 + 42 =

    asked by Kevin
  238. Math

    Landon is working one plans for a 12-acre housing development. A park will cover 2 1/2 acres, and paved areas will take 1 3/4 acres. How many acres are left for home sites??? Please show work, for how you did it

    asked by Madelyn Santiago
  239. International Buisness

    The marketing department is asked to formulate a strategy for disseminating product information on new drug Tigason. As the marketing manager what do you recommend?

    asked by Maggie
  240. math

    in a survey of 375 people, one fifth of them chose pecan pie as their favorite dessert. To find the number of people who chose pecan pie as their favorite, you can multiply 375 by ____.

    asked by aryah
  241. accounting

    You notice that your accounts receivable days have doubled in the first six months of this year. Do you give the A/R Director a bonus or put him/her on probation? Why? Explain fully what questions you would ask the Director about the A/R and why it has

    asked by christine
  242. chemistry

    Calculate the molarity of each. a. 1.50 mole of NaCl in 8.00 L of solution 0.188 M NaCl b. 270 mg of NaCl in 3.00 mL of solution 90 M NaCl

    asked by krystal
  243. statistics

    Sample with size n = 100 has mean = 30. Assuming the population standard deviation is 8, construct 95% confidence interval for population mean.

    asked by Tina
  244. English

    Please help me create a fordable about the compassion of adverbs by using 10 regular and 5 irregular adverbs. I have to pass this assignment on Feb. 23, 2012. Thank you Ramon Christopher

    asked by Ramon Christopher
  245. computers

    what is it called when websites that look like legitimate sites are used to collect private information for malicious purposes? I say phishing

    asked by Elizabeth
  246. Organic Chemistry

    Is there a systematic way to get all the boat conformations? I can get all of the chair conformation for, say, cyclohexanol, but can't figure out the boat conformations.

    asked by Vy
  247. Math

    Simplify each expression. Write answers using positive exponents. a. (7x^2y^3)(-2xy) b. (a^2b^3)^-1(a^2b^3) c.(-4m^3)^2

    asked by Amanda
  248. Math

    Mr.Zhao sells lemons Lemons 1 for $1 or 12 for $6 Joseph wants to buy 27 lemons from Mr.Zhao. What is the least amount of money Joseph should have to pay him? A.$27 B.$24 C.$15 D.$12 C?

    asked by J.C.
  249. math

    Mrs.Chavez is on an 8-kilometer hike. She wants to reach the halfway point of the hike in 3 hours. She plans to hike 1.5 kilometers the first hour and 1.5 kilometers the second hour. What could she do to determine how far she should hike in the third hour?

    asked by Colton
  250. Physics

    Consider a point charge with q= 1.5*10^-8 C. (a) what is the radius of an equpotential surface having a potential of 30 V?(b)Are surfaces whose potential differ by a constant amount (1,0 V) evenly spaced in radius?

    asked by Jc
  251. Trigonometry (Help and Check)

    Evaluate (exact answers): a) sin^-1(cos30) Need help. What do I do? b) sin[(cos^-1((sqrt2)/(2)))+[(sin^-1((sqrt2)/(2)))] = sin(45+45) = sin90 = 1 Is this correct? c) cos(arctan5/7) = 7/(sqrt74) = (7sqrt74)/74 Is this correct? Please and Thank you!

    asked by Anonymous
  252. Trig Help (URGENT)

    Solve over the indicated interval: 2sin^2x=sqrt2sinx , [-180,180) don't how to get x by itself please help and thank you

    asked by Anonymous
  253. math

    An adult concert ticket cost $25 less than twice a chile's ticket. What is the expression that it represents the price of an adult ticket?

    asked by gary
  254. math

    Joe needed two boards measuring 1 foot 9 inches and 3 feet 5 inches to complete his project. He wanted to find a total of the amount of wood he would need to buy? How would I simplify this?

    asked by Rosie
  255. geometry

    How would you complete the table? number of sides: 3, 4, 5, 6 measure of angle: 60, 90, B, C sum of angle measures:180, A, 540, D a:A = 120º; B = 360º; C = 180º; D = 1080º b:A = 210º; B = 180º; C = 270º; D = 720º c:A = 360º; B = 108º; C = 120º;

    asked by steve
  256. Physics

    A wheel 1 meter in diameter is rotating at 100 revolutions per minute without slipping along a level stretch of road and passes mile marker 0 at 12:00 noon. it continues past mile marker 0 for 10 minutes and then has a period of angular acceleration of

    asked by Maria
  257. business

    Which is recommended when negotiating for salary and benefits A- Counter a low offer from the company by stating that you would find it difficult to accept the job under the terms offered. B- Ask for what you need to make a comfortable living, regardless

    asked by Anonymous
  258. pysics 1

    You are walking on a moving walkway in the airport. The length of the walkway is 40.1 m. If your velocity relative to the walkway is 2.41 m/s, and the walkway moves with a velocity of 1.59 m/s, how long will it take you to reach the other end of the

    asked by jelena pleeease help
  259. trig

    John weighed five rocks two at a time in all possible ways. The weights in pound are 30,38,41,42,45,46,50,53,58,61. How much does each rock weigh?

    asked by pc
  260. education

    What types of hardware are available in K-12 classrooms today? Which ones would you consider essential for students' learning? Explain.

    asked by danie
  261. physics

    When measuring kinetic friction, why is it necessary to move at a constant velocity?

    asked by Anonymous
  262. statistics

    The data listed below shows the number of hospitals in each state, using the data, complete a frequency table using 8 classes. all the data has been ordered from smallest to largest.

    asked by Justin
  263. statistics

    The data listed below shows the number of hospitals in each state, using the data, complete a frequency table using 8 classes. all the data has been ordered from smallest to largest.

    asked by Justin
  264. business

    A job application letter is effective in convincing the reader that an applicant is knowledgeable of the company by? a.)providing relevant evidence from what the applicant has done in the past to support claims that this person can do the job.

    asked by Anonymous
  265. physics

    Einstein saud that the amount of energy in matter is given by E=mC^2 where if m is in kilograms and c=3x10^8 which is the speed of light. The energy is E is given in Joules. Assuming that is takes an average of 1x10^11 Joules to heat your house during the

    asked by sarah
  266. english

    Hi, I have to compare the story Young Goodman Brown to some modern day song or movie or television show (some form of entertainment). Do you have any ideas I could use?

    asked by jon
  267. calculus. please helppp!!

    1.) values of f(t) are given in the following table: t 0 2 4 6 8 10 f(t) 137 112 88 68 49 34 Estimate (f prime) f^' (2) and f^' (8) Please show work so I can understand. I'm really stuck. if the table comes out messed up, the values are: (0, 137) (2, 112)

    asked by JJ
  268. math

    the teachers and parents will make 4 large pots of soup for dinner. about how many servings willeach pot need to contain to feed 85 students,4 teachers,and 6parents?

    asked by esha
  269. math

    use I and a dot to show the number 52

    asked by chris
  270. Thermodynamics

    Consider a system consisting of two glass bulbs, each with volume V, and each containing n moles of gas. Bulb A contains nA moles of A and bulb B contains nB moles of B (a different gas), nA = nB. The bulbs are connected by a closed stopcock. The stopcock

    asked by Becky
  271. algebra

    A bump on a DVD needs to be between 0.45 and 0.55 micron wide and 0.95 and 0.99 micron high. write two absolute value inequalities describing the width (x) and height (y) of the bump.

    asked by kelly
  272. TO MS.SUE

    DECREED MEANS TO CAMMAND.IMPLORE MEANS TO BEG.NOW IM IMPLORING YOU FOR YUOR HELP! I DON'T GET THE QUESTION!

    asked by Celest
  273. Chemistry

    I think I have the answer to this question but need some help! Display the final answer in correct scientific notation and show correct number of significant figures in the final answer: 6.0223010000 x 10-24 x 2.222090001 x 10-30

    asked by Susan
  274. Organic Chemistry

    Do these two names refer to the same compound: N-butylcyclohexylamine vs N-butylcyclohexanamine?

    asked by Vy
  275. to mRS.SUE

    BUT I DON'T UNDERDSTAND HOW YOU EXPLAIN IT!SO FOR MATH,THE ANSWER IS 20?HOW DID YOU GET THAT ANSWER?I NEED AN EXPLANATION!

    asked by Celest
  276. chemistry

    a 0.25-g sample of a liquid was vaporized at 100 degree celcius. The vapor occupied 125 ml under a pressure of 0.96 atm. What is the molecular weight of the liquid?

    asked by Tam
  277. Math

    State the slope and y intercept for the graph of each equation. y=x+2

    asked by Cassie
  278. Living ENvironment

    Where is the Enzyme/substrate complex

    asked by alex
  279. math

    identify the property that it shown. 2*8*5=2*5*8

    asked by Sonia
  280. computers

    :0 is an example of internet slang. I say true

    asked by Elizabeth
  281. to ms. sue

    THANK YOU! NOW I GET IT.TELL ME, ARE YOU A TEACHER?WHAT SCHOOL DO TO TEACH?YOU REALLY HAVE THE PATOENT BECAUSE I ASKED YOU A MILLION TIMES AND YOU STILL TEND TO HELP ME!!!

    asked by Celest
  282. English

    Could you please check these few sentences? Thank you 1) I've been a Tim subscriber for two years. I top up my mobile every two weeks. I recharge it every evening. 2) I keep in touch with my friends by sending them email and by chatting on Facebook. 3) I

    asked by Henry2
  283. BUSINESS

    The best response to the question Why should I hire you is to A- explain your financial situation. B-admit that you probably are not the best person for the job. C- explain your strengths for this job D- list the relatives and friends who hope you get this

    asked by Anonymous
  284. Math

    The table shows the total number of emails that the Wright family received this morning Member Mr.Wright Mrs.Wright Cole Trinity Emails 7 8 3 3 Mr.Wright=7 emails Mrs.Wright=8 emails Cole=3 emails Trinity=3 emails If the family receives 7 more emails,which

    asked by J.C.
  285. math

    I have a rectangle w/ 20 boxes in it what would 1/5 of the boxes be?

    asked by Bob
  286. English - Ms. Sue

    For my slideshow I had wrote down - - Jake draws away from everyone. But corrected it to withdraw, so would that be like - -Jake withdraws away from everyone, or Jake withdraws from everyone? I also wrote - - to act positive and move on, but she corrected

    asked by Aaron
  287. pysics 1

    At the end of the spring term, a high school physics class celebrates by shooting a bundle of exam papers into the town landfill with a homemade catapult. They aim for a point that is 31.1 m away and at the same height from which the catapult releases the

    asked by jelena pleeease help
  288. Physics

    How do you calculate distance with an angular acceleration and a time?

    asked by Anonymous
  289. biology

    Discuss the concept of species What ways do modern taxonomists use to distinguish different species?

    asked by sharday
  290. biology what is DNA

    why is DNA replication necessary to life?

    asked by Shreya
  291. Calculus

    An object moves in a straight line. Its velocity, in m/s, at time t is v(t)=4t^2/(4+t^3), t>(greater or equal)0. Determine the maximum and minimum velocities over time interval 1

    asked by Jake
  292. physics

    A hydraulic jack is used to move an 8896 Newton car. If the area of the output piston is 8 times that of the input piston, how much force is required to lift the car?

    asked by RENEE
  293. US HISTORY

    Where did Prohibition Strongly take place and what were the major developments

    asked by DAN
  294. physics

    Use the fact that a typical proton is spherical and has a diameter of 1x10^-13 cm and a mass of 1.67x10^-24 grams, compute density of a proton.

    asked by sarah
  295. Essay Check

    This is a paragraph in my essay. Please tell me if this makes any sense. (basically I want to save money by earning a quality and cheap education so I can save money to be able to open a free clinic to help people) >>>>>>>>>>>>>>>> By attaining education

    asked by Hero
  296. physics

    Given x(t) = xm cos 2ðt/T for a spring with constant k and attached mass m sketch as a function of t, (a) the displacement x, (b) the velocity v, (c) the acceleration.

    asked by Noel
  297. algebra

    A typical DVD can store between 137.9 and 142.1 minutes of data before it is considered full. write an absolute value inequality describing the minutes of data (w) a full DVD will hold.

    asked by kelly
  298. Physics

    Going at an angular velocity of 5.2 rad/sec, how far in kilometers will a car have traveled in 10 minutes? Do I just convert minutes to seconds and multiply or...?

    asked by Maria
  299. Biology

    Are saltwater gills different from freshwater gills? Please explain to me

    asked by Rueangsit
  300. Math

    10x >2(7x+3)+2 Please help me solve this and show your work thanks

    asked by Haylie
  301. Medical Language

    How will Medical Language be helpful in the future?

    asked by Ashanda
  302. math

    What is the rule for this sequence? 72 , 63 , 54 , 45 , 36 Each number in the sequence is 10 less than the previous number. Each number in the sequence is 9 less than the previous number. The sequence decreases by multiples of 9. First by 9, then 18, then

    asked by Kylie
  303. chemistry

    Potassium iodide (KI) is used to treat iodine deficiencies. What is the %(w/v) of a 55 mL solution containing 1.3 g of KI? 0.024

    asked by krystal
  304. English

    Can you help me complete the sentence? I'm worried about Brian's +ing Thank you.

    asked by Henry2
  305. politics

    what is the don't ask don't tell? and are there other related terms they use with this? thank you

    asked by sandy
  306. grammar

    All of the villagers were fascinated with new technology. were is the linking verb and is linking fascinated. Is fascinated an adjective?

    asked by Dakota
  307. english

    Does Victor have an obligation to the monster in Frankenstein? Why?

    asked by Katie
  308. grammar

    Is concerned an adjective in the following sentence.The village was concerned about the lack of water.

    asked by Dakota
  309. math

    One estimate for the distance from earth to the andromeda galaxy is 2,400,000 light years. What is this distance expressed in scientigic notation?

    asked by john
  310. Math

    6-1/5y is less than or equal to 7 Please help me solve this and show your work thanks.

    asked by Kim
  311. math

    First estimate 1 1/8 ÷ 5 5/8. Then divide to find the exact answer. Simplify all answers.

    asked by Anonymous
  312. social work

    What are some of the issues that need to be addressed in the hiring of competent staff in working with people with disabilities? I am only finding information about employing those with disabilities. How do I phrase this question to Google or ideas where

    asked by Mary
  313. physics 1

    The position of a particle moving along the x-axis is given by x = 3.49t2 – 2.21t3, where x is in meters and t is in seconds. What is the position of the particle when it achieves its maximum speed in the positive x-direction?

    asked by jelena pleeease help
  314. Chemistry

    What is the net ionic equation for the reaction that occures between nitrouse acid and strontiun hydroxide ?

    asked by Cynthia
  315. Math

    what is the cube root of -1/64

    asked by Lisa
  316. Chemistry

    Display the final answer in correct scientific notation and show correct number of significant figures in the final answer: 6.0223010000 x 10-24 x 2.222090001 x 10-30 I get this far and then get stuck: 13.3820948351123 x 10 -54

    asked by Susan
  317. business

    A job application letter is different from a resume in that: a.it presents a job candidate's qualification. b.it uses short,parallel phrases and sentence fragments. c.it is adapted to a position rather than to the needs of a particular organization. d.it

    asked by Anonymous
  318. US HISTORY

    How Does prohibition era affect today life

    asked by DAN
  319. photo

    And you call me a geek? Shuh. I'm tnnkhiig you're Supergeek.Reply by on August 27th, 2009 at Thursday, August 27, 2009 @ 1:06 pm@Coal Miner's Granddaughter, you own a stormtrooper costume!

    asked by tycofiLi
  320. chemistry

    how does the electrolyte paste in a battery work

    asked by bob
  321. reading

    IF SOMEONE IMPLORED YOU TO do something, would you be more or less likely to do it,then if he or she decreed you to do that?Explain.

    asked by Celest
  322. algebra

    A DVD player's laser reader helps to "read" the information on the DVD. A particular laser reader measures 0.56 micron thick. does this fall with the required standards if a company uses |t - 0.03 |

    asked by kelly
  323. English

    Writeacher, where shall I "who"instead of which" in the sentence below? Thank you. 1) In all revenge tragedies a sexual or violent crime is committed against a family member of the hero, which (stands for the "crime") for various reasons cannot be

    asked by Henry2
  324. Microeconomics

    Consider the markets for pizza and fried chicken. Show graphically and explain the impact you would expect if technological change leads to the development of a pizza oven that is both much cheaper and uses less energy than current ovens.

    asked by Lilly
  325. US HISTORY

    What other laws were passed during the prohibition era. (EXCLUDING the 18Th amendment and Volstead act) THANX

    asked by DAN
  326. pre-algebra

    solve 26-3*2 ____________ 4^4 + 3^4

    asked by susan
  327. english

    I need examples of a sonnet!

    asked by ashley
  328. Science/geology

    Why does the Red River flow north, and the Mississippi River flow south?? I think it has something to do with elevation.. but I'm not sure.

    asked by Lee
  329. BUSINESS

    Which is typical behavior of a successful interviewee A- Making eye contact often with the interviewer B- Avoiding the use of technical jargon C-Making it clear that you are using the interview to learn about the company and what it offers D- Responding

    asked by Anonymous
  330. Science

    What is the realtionship between the second law of thermodynamics and Gibbs free energy

    asked by Steph
  331. Math

    Beaufort Scale and Wind Effects 0 Smoke rises vertically 1 Smoke shows wind direction 2 Wind felt on face 3 Leaves move, flags extend 4 Paper, small branches move 5 Small trees sway, flags beat 6 Large branches sway, flags beat 7 Large branches sway,

    asked by Smith
  332. Project Management

    What elements do you think are critical when conducting project meetings and why do you think they are important? How do project meetings help with managing inter-organizational relations? Be sure to address the concept of group think in your discussion.

    asked by Cynthia
  333. math

    build equation Of the 15 players on the boys' soccer team, 2/5 are 8th graders. On the girls' soccer team,1/3 of 18 are 8th graders. How many 8th graders plaayed on the two teams.

    asked by Anonymous
  334. math

    factorise 6m squared - 600

    asked by sarah
  335. prealge

    how do you solve this original price 60$ and discount percent: 20%

    asked by vick
  336. Math

    how do you post 21/2 and 1 on a graph

    asked by Anonymous
  337. maths

    let f(x,y)=sqrt (1-x^2-y^2) where x^2+y^2

    asked by simran
  338. Calculus

    Find the derivative of y = ln |cos(ln)|. I got -tan(ln x)/x, is this correct?

    asked by Emily
  339. MATH !!!!!!!!!!

    IN MR.MAROLE'S CLASS, THREE FOURTH OF THE STUDENTS TAKE MUSIC LESSONS.THAT IS, 15 STUDENTS TAKE MUSIC.HOW MANY STUDENTS ARE IN MR.MAROLE'S CLASS?

    asked by Celest
  340. Math

    k/5+3/20

    asked by Amanda
  341. science

    a car starts from a stop. at the end of 30 seconds its speed is 20 meters per second. what is the acceleration of the car?

    asked by morgan
  342. us history ( 8TH)

    at around 1832, was John C. Calhoun, Andrew Jason`s VP????

    asked by sammie doodles :-)
  343. computers

    forums and discussion boards are the same thing. I say true

    asked by Elizabeth
  344. writing

    How would you feel if your teacher did not give you a present

    asked by problem solver
  345. social studies

    How did religon affect social order in Sumer?

    asked by 5123
  346. math

    swimming lessons at the local park district swimming pol cost $18.00 for 3 weeks of lessons. What is the best estimate of the total cost for 8 people to take swimming lessons at the pool?

    asked by cindy
  347. APUSH

    Explain the rise of the republicans and the international challenges faced following world war I?

    asked by Sonja
  348. science

    why is the gibb free energy important in plant biology

    asked by Steph
  349. Vocabulary

    What does intuitive mean?

    asked by LA
  350. English

    Would another past tense from be has ran or what would you combine with had, has, or have for past tense?

    asked by Jim
  351. information literacy

    which of the following types of documents are considered primary sources?

    asked by anita
  352. College Algebra 1050

    Assume you are on a planet with a gravity constant g (instead of 32 feet per second squared) and a speed of sound c (instead of 1100 feet per second), and that you hear the impact of the rock after t seconds. Then the depth of the well is x feet, where

    asked by John
  353. Chem

    how much energy is required to change 42.5 g of molten aluminum into aluminum vapor

    asked by Alex
  354. biology

    any site i go onto that be animation site to find out about nucleic acids and protein synthesis? this chapter soo hard. codon, anticodon i need animation.

    asked by Shreya
  355. ecology

    how has the eucalyptus tree adapted to the australian environment

    asked by Anonymous
  356. calculus

    integral from 1 to e^5 1/(x(sqrt4+lnx))dx

    asked by harish
  357. math!

    IN MR.MAROLE'S CLAOF THE STUDENTS TAKE MUSICSS, THREE FOLESSONS.THAT IS, 15 STUDENTS TAKE MUSIC.HOW MANY STUDENTS ARE IN MR.MAROLE'S CLASs? explain.

    asked by Celest
  358. Physics - Question

    I have this number where they give me the coordinates of 3 particles and the mass of each one of them. Afterwards, there's a force applied on 2 of those particles and they ask me to calculate the systems total moment of inertia. But then they ask me this:

    asked by Raf
  359. enc

    Challenge you might encounter when building a working draft of compare and contrast essay

    asked by Anonymous
  360. math

    name two different numbers that are greater than .66 and less than .9

    asked by k
  361. computers

    does cookies help web pages remember your username and password?

    asked by Elizabeth
  362. math

    no i cant can u explain please

    asked by marshalena
  363. computers

    what term is given to pieces of computer software that allow you to manage your e-mail from your computer? I say e-mail filters

    asked by Elizabeth
  364. math

    if u bought a juice for $1.25 and used 11 coins to pay for it what combination of coins could you use

    asked by Anonymous
  365. MATH

    6.8M = HOW MANY CM

    asked by Anonymous
  366. e-Commerce

    If I opened a business and was offered $1,000, should I sell or not? why? Cite the ethical dilemmas.

    asked by sue
  367. chemistry

    what are three common ores from which copper can be extracted

    asked by drew
  368. algebra 2

    solve the equation m^6 -64=0

    asked by Gabby!
  369. Algebra

    2= 10+z/-3

    asked by tracy
  370. politics?

    what is gm bailout?

    asked by sandy
  371. college algebra

    what is 5/a-3b/a^2

    asked by Cambren
  372. math

    2/7n+n=5/9

    asked by taylor
  373. Pre-Algerbra

    2/7n+n=5/9

    asked by taylor
  374. Pre-Algerbra

    8--w/10=3/5

    asked by taylor
  375. math

    2/7n+n=5/9

    asked by taylor