Questions Asked on
January 20, 2012

  1. Geometry

    Kristen lives directly east of the park. The football field is directly south of the park. The library sits on the line formed between Kristen’s home and the football field at the exact point where an altitude to the right triangle formed by her home,

    asked by Ash
  2. Physics

    Figure (a) shows charged particles 1 and 2 that are fixed in place on an x axis. Particle 1 has a charge with a magnitude of |q1| = 12.0e. Particle 3 of charge q3 = +13.0e is initially on the x axis near particle 2. Then particle 3 is gradually moved in

    asked by Phil
  3. Math 5th

    4/7 of a group of children are boys. If there are 18 more boys than girls, how many children are there altogether?

    asked by Patty
  4. Geometry

    A triangle has side lengths of 18 cm, 80 cm, and 81 cm. Classify it as acute, obtuse, or right.

    asked by Ash
  5. Physics 2

    A 10 g bullet is fired into, and embeds itself in, a 2 kg block attached to a spring with a force constant of 19.6 n/m and whose mass is negligible. How far is the spring compressed if the bullet has a speed of 300 m/s just before it strikes the block and

    asked by Dee
  6. earth

    Body on surface of earth weighs 400 lb. Radius of earth is about 4000miles. If same body were placed on 4000 mile high tower, what would its weight be

    asked by jerry
  7. Physics

    A test tube standing vertically in a test tube rack contains 2.4 cm of oil, whose density is 0.81 g/cm^3 and 6 cm of water. What is the gauge pressure on the bottom of the tube? The acceleration of gravity is 9.8 m/s^2. Answer in units of Pa

    asked by Solana
  8. Chemistry

    What is the mass of 65.0mL of ethanol? the density of ethanol at room temperature=0.789g/mL

    asked by Unknown
  9. physics

    Two cars cover the same distance in a straight line. Car A covers the distance at a constant velocity. Car B starts from rest and maintains a constant acceleration. Both cars cover a distance of 487 m in 216 s. Assume that they are moving in the +x

    asked by Natasha
  10. geometry

    Quadrilateral QRST is a square. If the measure of QR is 3x – 6 and TS is 6 - x. Find the area of the square.

    asked by d
  11. math

    the perimeter of a triangle is 54 centimeters. the longest side is 6 centimeters less than the sum of the other two sides. Twice the shortest side is 10 centimeters less than the longest side. Find the lengths of each side of the tirangle

    asked by Toni
  12. physics

    (a) Just for fun, a person jumps from rest from the top of a cliff overlooking a lake. In falling through a distance H, she acquires a certain speed v. Assuming free-fall conditions, how much farther must she fall in order to acquire speed 2v? Express your

    asked by Natasha
  13. economics

    While shopping you discover that your favorite department store has lowered the price on a hot, new MP3 player that you wanted to buy. You rush into the store, only to find that they are sold out. This scenario illustrates the concept of a) scarcity b)

    asked by adrina
  14. Business

    1. What effect would the following actions have on a firm’s current ratio? Assume that new working capital is positive. a. A short term bank loan is repaid. b. A long-term debt is paid off early. For a, would the current ratio move away from 1. For b,

    asked by Alice
  15. chem

    the solution with the lowest pH is A. 1.0 M HF B. 1.0 M HCN C. 1.0 M HCOOH D. 1.0 M CH3COOH and how did you find it?

    asked by Saphire
  16. calculus

    Find the limits Lim(sin kt/t) t approaches 0 and (K is constant) How do you start this and go about it stepwise? Does knowing (K constant) help me to solve this?

    asked by John
  17. Finite: College Math

    A student wants to buy 3 CDs, but assume that there are 6 CDs featuring the piano, 4 CDs featuring the trumpet, and 7 CDs featuring the saxophone. In how many ways can the selection be made if CD's featuring at least 2 different instruments are selected?

    asked by Laura
  18. business

    A business wants to share its customer account database with its trading partners and customers, while at the same time providing prospective buyers with access to marketing materials on its Web site. Assuming that the business is responsible for running

    asked by Anonymous
  19. financial accounting

    Connection Station, an internet café, had the following operating activities during the month of May: 1. Bought 800 in jump drives and disks, which are available for resale from Office Depot on credit 2. Paid 900 in utilities for the month of may 3. Paid

    asked by Ashley
  20. Chemistry

    Suppose 24.9 grams of copper (II) nitrate is dissolved in 200. milliliters of a 0.70 moles/liter aqueous solution of sodium chromate. Calculate the final molarity of nitrate anion in the solution.

    asked by Deborah
  21. Calculus AB

    A particle is moving along the x-axis so that at time t its acceleration is a(t)=ðcos(ðt) At time t=1/2, the velocity v of the particle is 1/2. Find the velocity of the particle at any time t. I think I got that right, as sinðt + C. Now it wants the

    asked by Savannah
  22. Chemistry

    The four statements below are used for applications of Hess's law. One of the statements is erroneous. Choose that statement. a) the value of delta H for any reaction that can be written in steps is the sum of the values of delta H for each of the

    asked by Hannah
  23. Math

    True or False. A quadrilateral with these following vertices is a parallelogram. (-4,-3),(2,-3),(4,-6),(-4,-6)

    asked by Callie
  24. physics

    What is a characteristic property? List 3 characteristic properties

    asked by keria
  25. trig

    if you are riding on a ferris wheel that is 60 ft tall and it takes you 5 minutes to make 1 revolution, what is your linear velocity?

    asked by Destiny
  26. maths

    the area of a rectangle is 12 square c.m and its length is 4 c.m what is its width?

    asked by jack
  27. History

    What geographical features have affected Russia's climate, and how have they affected it?

    asked by Sam
  28. physics

    An electric motor lifts an elevator 1.1 m in 13.0 s by exerting an upward force of 7.80 x 104 N. What power does the motor produce in kW?

    asked by abby
  29. Physics

    A skateboarder, starting from rest, rolls down a 12.5-m ramp. When she arrives at the bottom of the ramp her speed is 6.45 m/s. (a) Determine the magnitude of her acceleration, assumed to be constant.

    asked by Kayla
  30. Chemistry

    What is the formula for Celsius and Kelvin scales for temperature?

    asked by Stephanie
  31. physics

    An 18-year-old runner can complete a 10.0 km course with an average speed of 4.58 m/s. A 50-year-old runner can cover the same distance with an average speed of 4.36 m/s. How much later (in seconds) should the younger runner start in order to finish the

    asked by Natasha
  32. Huck fin

    If you have read Huckleberry Finn before, what was your initial reaction to it?

    asked by Jordan
  33. Math

    The area of a circle is 16π cm2. What is the circle's circumference? 2π cm 4π cm 8π cm 16π cm

    asked by Callie
  34. Math

    The point A (-7, 5) is reflected over the line x = -5, and then is reflected over the line x = 2. What are the coordinates of A'? (7, 19) (10, 5) (7, 5) (10, 19) Question #45 MultipleChoice The vertices of an isosceles triangle are A(3, 6), B(7, 2), and

    asked by Callie
  35. math

    How can you tell if a number is rational or irrational? a) 3.215 (there is a line drawn over the 15) b.) square root 10 c) 0.143639854024 d)4.312 can you please explain what i need to look at to tell which is which?

    asked by christy
  36. 9th gradae physical science

    teh density of copper is 8.92 g/cm3. If you plotted the mass of copper in grams versus the volume in cubic centimeters, what would the slope of the line be?

    asked by allie
  37. Civics

    Which is NOT a responsibility of the Department of Agriculture? 1. The opening of foreign markets to U.S. agricultural products =2. To oversee federal anti-hunger programs 3. The designation of lands for private and public use 4. Support for farmers with

    asked by Sierra
  38. physics

    The longest distance in a track and field event is the 10 km run. The record holder for the women's 10 km run is Wang Junxia of China. Assuming that Wang Junxia ran a distance of 10.00 km with an average speed of 5.644 m/s, what was her time? (Hint: Need

    asked by Juanita
  39. Maths

    solve 3^x=4^(x-2)

    asked by Peter
  40. physis

    The magnitudes of the four displacement vectors shown in the drawing are A = 13.0 m, B = 11.0 m, C = 12.0 m, and D = 27.0 m. Determine the magnitude and directional angle for the resultant that occurs when these vectors are added together.

    asked by Natasha
  41. math problem

    is (-4, 7) a solution of 6x -5y = -2

    asked by Lavern
  42. Physics

    A column of water has a diameter of 2 m and a depth of 8.6 m. How much pressure is at the bottom of the column? The acceleration of gravity is 9.8 N/kg. Answer in units of Pa

    asked by Solana
  43. Precalc

    Given g(x) = (x + 5)(x2 - 6x + 13), find the one real zero of g(x): I think it's -5 Find the two complex zeros of g(x):

    asked by Anon
  44. HCA331

    To complete the following assignment, go to this week's Final Paper link in the left navigation. Final Project Given all of the information that you have learned about health care education, this assignment challenges you to convey that information to

    asked by Susan
  45. physics

    Assume your mass is 80 kg. The acceleration due to gravity is 9.8 m/s 2 . How much work against gravity do you do when you climb a flight of stairs 2.3 m high?

    asked by Anonymous
  46. maths

    DIFFERENTIATE FROM FIRST PRINCIPLES (I)3X (ii)X^2+2X+3 (iii)1/x^2

    asked by chrystabelle
  47. Algebra

    find the LCM of y^2+6y+9 and y^2+y-6

    asked by Rob
  48. math

    the perimeter of some traffic sign must be 150 inches also its length is 15 inches longer than its width, find the dimensions of this sign

    asked by De'andre
  49. algebra

    find the LCM of 11(z-3)and 33(z-3)

    asked by Rob
  50. MLIS

    Define Collection Development. How the acquisition of Library Material can be economical, rapid, transparent and accurate?

    asked by naseem jamshaid
  51. MLIS

    Q.2. Write in detail the acquisition process with examples.

    asked by naseem jamshaid
  52. MLIS

    Q.3. Why resource sharing is necessary in libraries? How an academic library can cooperate in collection development?

    asked by naseem jamshaid
  53. chemistry

    A 0.6996 g sample of a compound containing C, H, and F was burned to produce 0.6039 g CO2 and 0.1235 g H2O. If the molar mass of the compound was determined to be approximately 102.0 g/mol, what is its molecular formula?

    asked by kenny
  54. 3 grade english

    use each word or phrase as the subject of a sentence. add a verb describing an action that place in the present. make sure each verb agrees with its subect. they give a word my son make a sentence i just want to now did he write correct sentence or no the

    asked by dw
  55. French

    Can someone please help edit my French? My French: Quelles matières étudiez-vous cette année ? Moi, je fais deux les maths, la chimie, la physique, l’anglais et le français. Je n’aime pas les maths parce que il y a beaucoup des devoirs pour les

    asked by Darren
  56. Stats

    You are allowed to choose four whole numbers from 1 to 10 (including 1 and 10). You can only choose each number once though. Which of the following statements is FALSE? A. The numbers 4, 5, 6, and 7 have the smallest possible standard deviation. B. The

    asked by Nikki
  57. Math

    for every girl taking classes at the school, there are 3 boys who are taking classes at the school. If there are 236 students taking classes, write and solve a propotion to predict the number of boys taking classes at the school.

    asked by Garrett
  58. Geometry

    The length of the hypotenuse of a 30°-60°-90° triangle is 7. Find the perimeter. 7/2+21/2sqrt3 21+7sqrt3 7+21sqrt3 21/2+7/25sqrt3

    asked by Ash
  59. math

    Jimmy had a total of 163 apples and oranges. After selling 50% of all the apples and 20% of all the oranges, he had 110 fruits left. How many oranges did Jimmy have at first?

    asked by widyan
  60. Math

    Lisa is painting a fence that is 26 feet long and 7 feet tall. A gallong of paint will cover 350 square feet. Write and solve a proportion to determine how many gallons of paint Lisa will need. Thanks, Ms. Sue for the last one...I got it!

    asked by Garrett
  61. Chemistry

    Please help me with question #2: How do you determine if there is a linear relationship between NaCO3 used and CO2 produced?Discuss your results in terms of moles. Thank you!! Question #1 : 1. Record the amount of CO2 produced versus the amount of Na2CO3

    asked by Tony
  62. science 3 grade

    i need this question to be answered please this is question- how does wind affect the ocean's heat. and my son write the answer- the wind will cool down the ocean heat. and i need one more answer this question one more sentence he make two sentence of this

    asked by dw
  63. english

    I love college football: there’s nothing like the sound of a fully packed stadium. Is the words college football capitalizedin this sentence?

    asked by aran
  64. math

    The area of a rectangle is 24 m2. The length of this rectangle is 6 m. Which equation could be used to determine the width, w?

    asked by alexis
  65. Pre-Algrebra

    How do you solve 5+2c/4=14

    asked by Samantha
  66. mechanics

    An ocean-going ferryboat is 4.38 m wide and 6.53 m long. When a truck pulls onto it, the boat sinks 6.36 cm in the water. What is the weight of the truck?

    asked by jessie
  67. math

    a) Determine the placement of departments for a newly designed facility that will minimize total transportation costs using the data in the following tables. Assume that reverse distances are the same. The locations are shown in the grid. Use a cost of $1

    asked by Anonymous
  68. math

    a) Determine the placement of departments for a newly designed facility that will minimize total transportation costs using the data in the following tables. Assume that reverse distances are the same. The locations are shown in the grid. Use a cost of $1

    asked by Anonymous
  69. geometry

    If triangle ABC is equilateral with side lengths four times the square root of two and BD is perpendicular to AC, what is the length of BD.

    asked by shyandra
  70. Math

    A circle with the equation (x+3)squared plus (y-2)squared = 25 is reflected over the line x=2. What is the equation of the image? (x-3)^2 + (y+2)^2=25 (x-7)^2 + (y+2)^2=25 (x-7)^2 + (y-7)^2=25 (x-3)^2 + (y-2)^2=25

    asked by Callie
  71. physics

    What is a precipitate?

    asked by keria
  72. physics!!!

    An electric field of intensity 4.27 kN/C is applied along the x-axis. Calculate the electric flux through a rectangular plane 0.350 m wide and 0.700 m long if the following conditions are true. (a) The plane is parallel to the yz-plane. (b) The plane is

    asked by Isabella
  73. Business Finance

    Cassandra is repaying an installment loan of $3500 with 20 equal monthly payments of $196 each. What is the annual percentage rate of the loan?

    asked by Terry
  74. english

    can you help place quotation marks, commas, and periods where appropriate. My professor told us my favorite story by James Joyce is called The Dead Harold wrote I regret that I am unable to attend the fundraiser for AIDS research his letter, however

    asked by aran
  75. physics

    A de-orbit burn, similar to that presented in the previous math problem, has been performed. During this de-orbit burn a pre-calculated ∆V (delta V, change in velocity) of 290 ft/s (or 88.4 m/s) will be used to decrease the Shuttle’s altitude from 205

    asked by Levi B.
  76. Math

    Evan is painting a stool that has a cylindrical seat and four rectangular prism legs. The seat has a diameter of 8 inches and a height of 2 inches. Each leg is 2 inches by 2 inches by ten inches. How much area will Evan have to paint? Use three point one

    asked by Matthew
  77. Physics!!!

    The electric field everywhere on the surface of a charged sphere of radius 0.260 m has a magnitude of 545 N/C and points radially outward from the center of the sphere. (a) What is the net charge on the sphere?

    asked by Help
  78. Precalculus

    The polar equation of a graph is given below: r=4/sin(theta) Give the equation of the line in rectangular coordinates. If you rotate this graph 40 degrees counterclockwise about the pole, would you add or subtract 40 degrees to θ? Subtract?

    asked by Anon
  79. Precalculus

    Write the three cube roots of 8 cis (-30°).

    asked by Anon
  80. Precalculus

    Given r = 10 cos θ If you sketched an angle of θ = 150 degrees, what quadrant would it be located in? It's either the first or second... I think second? Multiply both sides of r = 10 cos θ by r. Transform the resulting equation into Cartesian

    asked by Anon
  81. maths

    a owns a rectangularers compound of length 40 meters and width 25 meters what is the area of this compound in ares

    asked by jack
  82. english

    can you check my puncuations. 5. My professor told us my favorite story by James Joyce is called, The Dead. 6. Harold wrote, I regret that I am unable to attend the fundraiser for AIDS research his letter, however contained a substantial contribution. 7.

    asked by aran
  83. maths

    what is the area of a rectangle of length 6 c.m and width 3 c.m ? what is its perimeter/

    asked by jack
  84. Precalculus

    The figure below shows a conchoid of Nicomedes. The top part is formed by a ray from the origin that rotates through an angle t° with the x-axis. The ray intersects the fixed line y = 2 at point A. From A you measure out 7 more units to point P on the

    asked by Anon
  85. maths

    the perimeter of a rectangle is 12 c.m and its length is 4 c.m . what is its width? and the area?

    asked by jack
  86. geometry

    In the diagram, UW and VW are midsegments of triangleRST. Suppose the length of UW is 78 inches. Find the length of VS.

    asked by ghalia
  87. Calc

    I have an acceleration function and a velocity function that I know the equations for. How would I use those to find the equation for a position function x(t) if x(0) = 0? I'm just looking for a general method, but I can give the equations if needed.

    asked by Kris
  88. Precalc

    (10 cis 200) (2 cis 50) = ? Is it just 20cis(10000)?

    asked by Anon
  89. economics

    Which of the following is not an economic right or responsibility? Question 8 options: a.deciding where to live b. choosing an occupation c. paying taxes d. being happy

    asked by adrina
  90. math

    In an AP, the thirteenth term is 27, and the seventh term is three times the second term. Find the first term,?

    asked by Babueddie
  91. Business Finance

    I came up with 4.80 per share for the question. A mutual fund has total assets of $57,000,000 and liablities of $8,550,000. If $15,960,000 shares outstanding, what is the net asset value of the fund? Please check my answer.

    asked by Terry
  92. Physics!!!

    The electric field everywhere on the surface of a charged sphere of radius 0.260 m has a magnitude of 545 N/C and points radially outward from the center of the sphere. (a) What is the net charge on the sphere?

    asked by Help
  93. Math

    There are twenty balls in the bag. Twelve are white, six are orange and two are pink. When I draw a ball from the bag, I remove it. What is the probability that my first draw is a white ball and my second is not?

    asked by Sarah
  94. very easy math question

    i doing my physics work and so i have to convert 0.0023mm to meters and it seem so easy but i not know how. i first convert it to cm, i times by ten then i divide by 100 to give me meters so i get 0.0023m but it suppose to be 2.3*10^5 m

    asked by Shreya
  95. Algebra

    Solve algebraically and check your potential solutions: sqrt((x+2) -x =0

    asked by Betty
  96. Chemistry

    How would you make 100mL of tartrate buffer, pH 3.5, from 0.100 M tartaric acid, 1M NaOH and deionized and distilled H2O? You need to consider the ionization of two the two acidic groups separately.

    asked by Elle
  97. Science

    "When Environmental Hazards happen, what should you do?"?

    asked by anne
  98. Chemisty

    16.72g of sodium acetate trihydride (MW=136 g/mol) is dissolved in 100mL water. To this, 4.00g glacial acetic acid (Ka=2.2x10-5, MW=60.0 g/mol) is added, and distilled water is added to to the 500mL mark. Find the final pH and the molar concentration of

    asked by Elle
  99. physics

    A thin spherical shell of mass 0.400 kg and diameter 0.190 m is filled with alcohol (ρ = 806 kg/m3). It is then released from rest on the bottom of a pool of water. Find the acceleration of the alcohol filled shell as it rises toward the surface of the

    asked by Anonymous
  100. Calc

    So I have a particle that is moving along the x-axis. I have the acceleration equation, the velocity equation, and the position equation. I need to know what is the first time when t>0 that the particle returns to the origin? My position function is

    asked by Kris
  101. physics

    What is a solution? What are the 2 parts of a solution

    asked by keria
  102. GeOmEtRy!!!

    what number is excluded from the domain of the function y=5/x-3? please help me! a. 3 b. Not Here c. -3 d. 5

    asked by VeRoNiCa C.
  103. physics

    An astronaut in his space suit has a total mass of 275 kg. His weight on the asteroid Erewhon is 0.3 N. What is the acceleration of gravity on Erewhon?

    asked by Bob
  104. physics

    A thin spherical shell of mass 0.400 kg and diameter 0.190 m is filled with alcohol (ρ = 806 kg/m3). It is then released from rest on the bottom of a pool of water. Find the acceleration of the alcohol filled shell as it rises toward the surface of the

    asked by Anonymous
  105. chemistry

    I need help with this problem... A 1.208 g sample of a compound containing C, H, and O was burned to produce 2.561 g CO2 and 0.3930 g H2O. Calculate the empirical formula of the compound. I always get stuck when it comes to finding the subscript for this

    asked by mark
  106. math

    what is the probability that a given day this month is a monday?

    asked by jiskha user
  107. chemistry

    The highest temperature ever recorded in the United States is 134F at Greenland Ranch, Death Valley, CA, on July 13, 1913. What is the temperature on the Celsius and Kelvin scales?

    asked by Stephanie
  108. Math question

    Please help me to solve by substitution method. 7x+8y =44 x=41-5y

    asked by DJ
  109. Public Health

    How do you think immigration of some ethnic groups has affected their risk of obesity and other chronic diseases? What intervention do you think can help to reduce obesity in children?

    asked by Jennifer
  110. algebra

    A rectangular room measures 13 ½ feet long by 22 ¼ feet wide. Find the area of the room; remember, area = length x width.

    asked by kim
  111. math

    During an art contest you and a classmate each won blue ribbons for 1/3 of the pieces you entered. You won 2 blue ribbons and the classmate win 3. Explain how.

    asked by Jake
  112. algebra

    could you please check this answer for me and correct. thanks given equation point slope form linear equation to use to do question. y-3 = 3(x+1) question rewrite this equation in standard form y- 3 + 3 = 3x - 3x +3 + 3 -3x+ y = 6 collect all variables on

    asked by ann
  113. speech

    what figure of speech is "it is a lovely little bright snake of a word"

    asked by marian
  114. math

    Simplify the square root. 2 square root 50. What are the steps to simplify this problem.

    asked by christy
  115. math

    How would you solve this problem: 3(x-2)-1=5x + 3 Can you please help!!!!

    asked by christy
  116. Precalculus

    A geometric series has t1 = 3 and r = 2. If tn = 96. What does n equal in this problem? What is the special name given to the terms between 3 and 96 in this problem?

    asked by Anon
  117. english

    27. In the story “In the Shadow of War,” why did Omovo refuse money from the soldiers?

    asked by ariel
  118. physics

    What is the concentration (in g/100ml ) of a solution which has 2,8g of NaCI dissolved into 88.0ml of water?

    asked by keria
  119. physics

    What is a mixture? describe the difference between a homogeneous and heterogeneous mixture

    asked by keria
  120. physics

    A 7.40 lb rock sits on top of a 76.0 foot cliff. it is pushed off. What is the energy in Joules of the rock just before it hits the ground?

    asked by Emeline
  121. ethics

    what is the and conventions or statuses of pureto ricans

    asked by hazel
  122. Physics

    A wooden block of mass 29.0 kg sits on a horizontal table. A wire of negligible mass is attached to the right side of the block and goes over a pulley (also of negligible mass, and frictionless), where it is allowed to dangle vertically. When a mass of

    asked by Bob
  123. Precalculus

    A geometric series has t1 = 100 and t2 = 90. Find the number to which Sn converges as n gets very large.

    asked by Anon
  124. speech

    Even when speaking, one must cross one's T's and dot one's i's. What does this mean when referring to public speaking? What public speaking term does this refer to?

    asked by Ty
  125. algebra

    factor 80x5th power -360x3rd power + 405x

    asked by ann
  126. Chemistry

    Is this correct? A 0.7473 g sample of a compound containing C, H, and O was burned to produce 1.909 g CO2 and 0.7813 g H2O. Calculate the empirical formula of the compound. I got C5 H10 O1. I'm not sure if that's correct..

    asked by Kyle
  127. eco/372

    How has the past and current fiscal policies, monterey policies, budget deficits, and surplus effected the economy and the computer industry.

    asked by at
  128. Chemistry(Please check)

    1)A piece of metal with a mass of 5.50 grams changed in temperature from 25 to 55 degrees celsius when 21.3 joules was absorbed. What is the specific heat of the metal? a)0.256 b)0.129 c)3.91 d) 7.75 e)0.710 Jg^-1 C^-1 I chose 7.75 because I did 5.50/21.3

    asked by Hannah
  129. chemistry

    Suppose 24.9 grams of copper (II) nitrate is dissolved in 200. milliliters of a 0.70 moles/liter aqueous solution of sodium chromate. Calculate the final molarity of nitrate anion in the solution.

    asked by Deborah
  130. science

    A proton (mass m = 1.67 multiplied by 10-27 kg) is being accelerated along a straight line at 2.2 multiplied by 1015 m/s2 in a machine. The proton has an initial speed of 2.4 multiplied by 107 m/s and travels 3.8 cm. (a) What is its speed? m/s (b) What is

    asked by derek
  131. Chemistry

    1) Consider the formation of sulfur trioxide according to the reaction: 2 SO2(g) + O2(g) -> 2 SO3(g) delta H = -198 How much heat is evolved in the formation of 750 grams of SO3? I am not sure how to start this problem.

    asked by Hannah
  132. sociology

    What are some changes that are occuring in families. Are these changes for the good or bad?

    asked by kate
  133. english

    could you please correct the sentence: i stopped to smoke last year

    asked by R S Telagathoty
  134. physics

    What is an isotope?

    asked by keria
  135. MaTh!!!!

    SIMPLIFY -2x(x^2+6x) + 3x(x+2)

    asked by VeRoNiCa C.
  136. Math

    What is the area of a parallelogram with a 60 degree angle and length of 6cm and side 8cm

    asked by Callie
  137. chemistry

    Assuming the temperature and pressure are held constant, which of the gas samples has the greatest number of gas particles? a. 45.0 mL O3 b. 35.0 mL N2 c. 15.0 mL of CO2 d. 25.0 mL of SO with the little 3 at the bottom.

    asked by Anonymous
  138. Chemistry

    A 0.5595 g sample of a compound containing C, H, and O was burned to produce 1.429 g CO2 and 0.5850 g H2O. If the molar mass of the compound was determined to be approximately 86.13 g/mol, what is its molecular formula?

    asked by mark
  139. trig

    How to get 5degree without using calculator using identities?

    asked by Laurnece
  140. chemistry

    As the temperature of a gaseous substance is decreased at constant pressure, it will undergo a series of physical changes. Which is the correct sequence of physical states that will be encountered?

    asked by erica
  141. chemistry

    As the temperature of a gaseous substance is decreased at constant pressure, it will undergo a series of physical changes. Which is the correct sequence of physical states that will be encountered? a.Liquid, solid, gas b.Gas, solid, liquid c.Solid, liquid,

    asked by erica
  142. math

    the total length of 2 ropes A and B is 7.23 m. the total length of 2/5 of Rope A and 3/4 of Rope B is 3.97 m. Find the length of Rope A.(Skill: equations) (step by step and give explanation if can)

    asked by widyan
  143. Precalculus

    I don't even how to go about this.... Mars is in an elliptical orbit with the Sun at one focus, as shown in the figure. At its aphelion, Mars is 156 million miles from the Sun. At its perihelion, Mars in only 128 million miles from the Sun. How long is the

    asked by Anon
  144. math

    explain the difference between the expressions x-3 and 3-x

    asked by daniel
  145. english

    could you please let me know the parts of speech separatly each word for the following sentence : all that glitters is not gold

    asked by R S Telagathoty
  146. Calculus

    Find a function f(n) which gives the rightsum approximation for the area under the given curve from x = 3 to x = 9 using n rectangles.

    asked by Helicia
  147. math (please help)

    Timothy had a total of 238 blue and red marbles. He gave 3/7 of the blue marbles and 5/8 of the red marbles away. Altogether, Timothy gave away 124 marbles.How many red marbles did Timothy give away? (Skill: Equations)

    asked by widyan
  148. Physics

    Figure (a) shows charged particles 1 and 2 that are fixed in place on an x axis. Particle 1 has a charge with a magnitude of |q1| = 12.0e. Particle 3 of charge q3 = +13.0e is initially on the x axis near particle 2. Then particle 3 is gradually moved in

    asked by Phil
  149. Physical Science/ Chemistry

    I don't get how to balance this equation. Al+O2 → Fe2O3 Where is the Al in the product? Where is the Fe in the reactants? I am very lost with this problem.

    asked by Alyonka
  150. Chemistry

    I need the equation for determining how to decide : You are given a dosage of 30m/kg to be given every twelve hours, how much is given (in grams) with each dose. I know the answer is obviously 15 m/kg but what is it in grams?

    asked by Sara
  151. math problem

    please find slope and y intercept f(x) = -3x -6 Slope = intercept =

    asked by Lavern
  152. math problem

    please solve using the multiplication principle -1/2x = -3/4

    asked by Lavern
  153. Chemistry

    large dose of vitamin C are supposed to cure the common cold. One commercial over-the-counter product consists of 500-mg tablets that are 20% by weight vitamin C. How many tablets should one take for a 1.30g dose of vitamin C?

    asked by Erica
  154. physics

    suppose that resting on your non-conducting desktop is a tiny piece of paper (m=0.08g) that has a charge of 4x10^-10C. You bring your comb 3 cm away from it and the paper jumps up to the comb. Give an approximate value for the charge of the comb. Does the

    asked by Brandon
  155. Math

    Find the angle the normal makes with the positive x–axis. 1. 3x – 2y – 1 = 0 2.5x + y – 12 = 0 3. 4x + 3y – 4 = 0 I cant Figure any of these out or how to do them..

    asked by Ciscokid
  156. physics

    The magnitudes of the four displacement vectors shown in the drawing are A = 15.0 m, B = 11.0 m, C = 12.0 m, and D = 21.0 m. Determine the magnitude and directional angle for the resultant that occurs when these vectors are added together.

    asked by Anonymous
  157. math

    The current I in an electrical conductor varies inversely as the resistance r of the conductor. The current is 6 amperes when the resistance is 920 0hms , what is the current when the resistance is 560 ohms

    asked by De'andre
  158. physics

    A space vehicle is coasting at a constant velocity of 21.1 m/s in the +y direction relative to a space station. The pilot of the vehicle fires a RCS (reaction control system) thruster, which causes it to accelerate at 0.380 m/s2 in the +x direction. After

    asked by Anonymous
  159. chemistry

    An element has ccp packing with a face-centered cubic unit cell. Its density is 1770 kg/m3 and the unit cell volume is 1.50 x 10-28 m3. Calculate the molar mass (g/mol) of the element to three significant figures.

    asked by Crystal
  160. Pre-Calc B

    How do I find zeros on a graph of a cubic function? I can tell that two of the zeros are -4 and 3 because they show on the graph, but how do I find the other?

    asked by Emma
  161. food and nutrition

    When running in cold weather which one of the following materials is not recommanded for layerimg next to the skin

    asked by Anonymous
  162. math

    If you have 1/2 x - 2/3 = 2 how would you solve, can you please help.

    asked by christy
  163. math problem

    please solve 4x is greater than or equal to 20

    asked by Lavern
  164. Precalculus

    QUESTION 1 Joe intercepts a pass 8 yards into the end zone, 19 yards from the right side of the field as he faces the opposite end of the field (see figure). He starts running diagonally, moving at a rate of 4 yd/s down the field and 2 yd/s across the

    asked by Anon
  165. physics

    An isotope of iodine is I-126.how many protons, neutrons &electrons does it have

    asked by keria
  166. physics

    PLEASE HELP ME SOLVE !!!! InMay 1998, forest fires in southernMexico and Guatemala spread smoke all the way to Austin. Those fires consumed forest land at a rate of 26900 acres/week. On the average, how many square meters of forest are burned down every

    asked by Ann
  167. Chemistry

    Write a chemical reaction showing an amphiprotic anion reacting as a base in water. Thank-you

    asked by Saphire
  168. Precalculus

    This figure shows concentric circles of radii 3 and 5, respectively, centered at the origin of an xy-coordinate system. A ray from the center at an angle of t degrees to the x-axis cuts the two circles at points A and B. From A, a vertical line is drawn;

    asked by Anon
  169. Precalculus

    The figure shows part of a curve traced by a point on the circumference of a circle of radius 4 that rotates, without slipping, around a fixed circle of radius 2. The rotating circle starts with angle t = 0 radians and the point P (x, y) at (10, 0). In

    asked by Anon
  170. physics

    Please help me solve !!! Water flows into a swimming pool at the rate of 9.83 gal/min. If the pool dimensions are 33.4 ft wide, 44.9 ft long and 19.9 ft deep, how long does it take to fill the pool? (1 gallon = 231 cubic inches) Answer in units of min

    asked by Kaleigh
  171. Inequality

    Solve: x - 4 less than or equal to 3x - 8 can u move the 4 and add and then move the 3x to the other side and it become -3x, and then solve?

    asked by christy
  172. DeVry University

    A seismograph 300 km from the epicenter of an earthquake recorded a maximum amplitude of 5.9 102 µm. Find this earthquake's magnitude on the Richter scale. (Round your answer to the nearest tenth.)

    asked by Sandra Beasley
  173. physics

    A ball of mass 1.04 kg at the end of a 0.52 m long string is swung in a vertical circle at the fastest constant speed the ball can have without the string breaking. If the string can only exert 33 N of force without breaking, a) What is the speed of the

    asked by Anonymous
  174. physics

    A skateboarder shoots off a ramp with a velocity of 6.4 m/s, directed at an angle of 61° above the horizontal. The end of the ramp is 1.4 m above the ground. Let the x axis be parallel to the ground, the +y direction be vertically upward, and take as the

    asked by Anonymous
  175. math

    An object with zero initial velocity accelerates at a constant rate of 10 m/s. find its average velocity during the first 15 seconds

    asked by hailey
  176. physics

    A boy hops on his bike and rides 135 meters in 20 seconds. What is his average speed?

    asked by Juanita
  177. physics

    A boy hops on his bike and rides 135 meters in 20 seconds. What is his average speed?

    asked by Juanita
  178. chemistry

    What isthe ionization of water?

    asked by Saphire
  179. chemistry(Please check)

    1)Which thermochemical equation and data does not agree with the other two written? a) 2NO (g)+ O2 (g) ->2 NO2 (g) deltaH=-169.8 b) NO (g) + 1/2 O2 (g) -> NO2 (g) delta H = -56.6 c) 4 NO2 (g) -> 4 NO (g) + 2 O2 (g) delta H = +226.4 d)all three equations

    asked by Hannah
  180. Language

    Homophones can be used humorously in riddles.The answer to each of the riddles below is a homophone groaner! a) What type of sandals do frogs like?Open_____. b)What is called when your rabbit is depressed? A bad_______day. c) What is the most important

    asked by <3
  181. Precalc

    A hyperbola has this Cartesian equation: -((x-2)/5)^2 + ((y+1)/3)^2 = 1 A. Find direction in which it opens. Horizontal? B. Find the coordinates of the center. I think it's (-2,1) or (1,-2)? C. Find the slopes of the asymptotes: m=+- ?

    asked by Grace
  182. Precalc

    An ellipse has this Cartesian equation: ((x-2)/5)^2 + ((y-4)/3)^2 = 1 Find the focal radius Find the eccentricity Write the parametric equations for the ellipse Transform into the form, Ax^2 + By^2 + Cx + Dy + E = 0

    asked by Grace
  183. greek philosophy and history

    what is a Sophist?

    asked by im_a_h8r_n_luvin_it
  184. greek philosophy and history

    what is the Socratic method???

    asked by im_a_h8r_n_luvin_it
  185. math

    Solve by the substitution method. What is the solution of the system? 3x+9y=48 -6x+y=56

    asked by Bre
  186. computer business

    1.As we move up the organization's hierarchy from clerical workers to executives, how does the type of support provided by information systems change? 2.How important are end users to the management of the organization's information resources?

    asked by RK
  187. Math problem

    Please find slope if it exists x=-2

    asked by Lavern
  188. Physics

    A jetliner, traveling northward, is landing with a speed of 67 m/s. Once the jet touches down, it has 765 m of runway in which to reduce its speed to 5.1 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take the

    asked by Natasha
  189. math

    How do u find the slope of y= 3x-5 would u use the formula y= mx + 1

    asked by christy
  190. science

    Starch is a complex carbohydrate manufactured by plants. True or False

    asked by im_a_h8r_n_luvin_it
  191. english

    I asked my father, “father, when will we take our vacation?”why does father i this sentence become capitalized:

    asked by aran