Most popular questions and responses by JOE
  1. Spanish 1 b

    please check my answers 2. How do you say one must in Spanish A. Hay que * B. A menudo C. Que más D. Es necesario 5. A person of mixed European and indigenous heritage is commonly to as a____ A. Mixtec B. Mestizo* C. Maya D. Nahuatl 6. Which is not a

    asked on April 18, 2017
  2. 7th grade

    What did the spanish farmer say to his chicken

    asked on October 21, 2009
  3. Math

    A group of nine students has a mean of 3.5 people in their households. Make a line plot showing an example of this data set

    asked on January 5, 2010
  4. physics

    when a 2.50 kg object is hung vertically on a certain light spring described by hookes law the spring stretches 2.76 cm. A) what is the force constant of the spring. B) if the 2.50 kg object is removed how far will the spring strecth if a 1.25 kg block is

    asked on November 6, 2011
  5. Physics

    A car of mass m moving at a speed v1 collides and couples with the back of a truck of mass 3m moving initially in the same direction as the car at a lower speed v2. (Use any variable or symbol stated above as necessary.) (b) What is the change in kinetic

    asked on March 12, 2014
  6. Physics

    A satellite used in a cellular telephone network has a mass of 2160 kg and is in a circular orbit at a height of 670 km above the surface of the earth. What is the gravitational force Fgrav on the satellite? Take the gravitational constant to be =

    asked on April 12, 2012
  7. physics

    A student witnesses a flash of lightning and then t = 6.5 s later the student hears the associated clap of thunder. Light travels at 3.0 × 108 m/s in the air. How long, t1, in seconds did it take the light to reach the student's eyes after the flash?

    asked on September 11, 2014
  8. trigonometry

    the bases of a trapezoid are 22 and 12 respectively. The angles at the extremities of one base are 65 degree and 40 degree respectively find the two legs. Answer using law of sines pls

    asked on February 10, 2012
  9. Physics

    One end of a uniform 3.20-m-long rod of weight Fg is supported by a cable at an angle of θ = 37° with the rod. The other end rests against the wall, where it is held by friction as shown in the figure below. The coefficient of static friction between the

    asked on April 5, 2014
  10. Physics

    On a frictionless, horizontal air track, a glider oscillates at the end of an ideal spring of force constant 2.30 N/cm. The graph in the figure shows the acceleration of the glider as a function of time. Find the mass of the glider. Find the maximum

    asked on April 19, 2012
  11. Physics

    A ball (mass m = 250 g) on the end of an ideal string is moving in a circular motion as a conical pendulum. The length L of the string is 1.84 m and the angle with the vertical is 37 degrees. a) What is the magnitude of the torque (N m) exerted on the ball

    asked on July 11, 2012
  12. Math 124

    There are several ways you might think you could enter numbers in WebAssign, that would not be interpreted as numbers. N.B. There may be hints in RED!!! You cannot have commas in numbers. You cannot have a space in a number. You cannot substitute the

    asked on September 28, 2011
  13. math

    Chances are 50-50 that a newborn baby will be a girl. For families with five children, what is the probability that all the children are girls

    asked on November 24, 2012
  14. physics

    A physics book slides off a horizontal tabletop with a speed of 1.10m/s{\rm m}/{\rm s} . It strikes the floor in 0.350s{\rm s} . Ignore air resistance.

    asked on May 17, 2014
  15. Physics

    The gravitational force exerted on a baseball is 2.28 N down. A pitcher throws the ball horizontally with velocity 12.0 m/s by uniformly accelerating it along a straight horizontal line for a time interval of 177 ms. The ball starts from rest. (a) Through

    asked on February 15, 2014
  16. Physics

    A mass is oscillating with amplitude A at the end of a spring. How far (in terms of A) is this mass from the equilibrium position of the spring when the elastic potential energy equals the kinetic energy?

    asked on April 18, 2012
  17. Algebra

    What is the ninth term of the arithmetic sequence defined by the rule A(n)=-14+(n-1)(2) A)232 B)230 C)2 D)4 Thanks

    asked on December 22, 2015
  18. physics

    a longitudinal wave with a frequency of 3.0 Hz takes 1.7 s to travel the length of a 2.5-m slinky (see figure 16.3). Determine the wavelength of the wave.

    asked on November 19, 2012
  19. pre calculus

    cube roots of 64i?

    asked on May 20, 2011
  20. math

    Macy's Department Stores markup men's cologne 63% on cost for an 8-ounce bottle. A bottle of cologne costs Macy's $23.00. What is the selling price for the 8-ounce bottle? $31.51

    asked on June 30, 2017
  21. chem

    How many moles of C6H12O6 are formed when 0.250 mole of CO2 is consumed in the reaction 6 CO2 + 6 H2O C6H12O6 + 6 O2?

    asked on June 20, 2012
  22. 3

    An astronomy student is studying the sun. While monitoring her equipment, she observes a solar flare. She then observes the reflection of the solar flare off of a passing satellite and with her equipment she is able to determine that the reflected light

    asked on September 11, 2014
  23. Calculus

    A street light is at the top of a 19 foot tall pole. A 6 foot tall woman walks away from the pole with a speed of 7 ft/sec along a straight path. How fast is the tip of her shadow moving when she is 30 feet from the base of the pole?

    asked on April 3, 2012
  24. Exponential Modeling

    A species of frog’s population grows 24% every year. Suppose 100 frogs are released into a pond. How many frogs will there be in 5 years?

    asked on April 30, 2016
  25. Math

    Use the figure to answer the following questions. figure for questions 1–3 1. Name a pair of complementary angles. (1 point) angle sign1 and angle sign4 angle sign1 and angle sign2 angle sign3 and angle sign4 angle sign1 and angle sign6 2. If mangle

    asked on March 8, 2015
  26. physics

    An oxygen molecule consists of two oxygen atoms whose total mass is 5.3 x 10-26 kg and whose moment of inertia about an axis perpendicular to the line joining the two atoms, midway between them, is 1.82 × 10-46 kg·m2. From these data, estimate the

    asked on January 2, 2012
  27. Chem

    In a coffee cup calorimeter, 50.0 mL of 0.100 M AgNO3 and 50.0 mL of 0.100 M HCl are mixed to yield the following reaction: Ag+ (aq) + Cl- (aq) -----------------> AgCl (s) The two solutions were initially at 22.60 °C, and the final temperature is 23.40

    asked on November 2, 2011
  28. Social Studies

    The Northwest Ordinance established all of the following, except rules for territories to become states. denying slavery to new states formed from the territory. preventing new states from entering the United States. the right to education (------my choice

    asked on April 15, 2016
  29. Math

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

    asked on October 13, 2010
  30. Statistics

    WEB CALCULATOR EXERCISE Descriptive Statistics 1 The table below presents data for a sample of people who completed a religious survey. Age Gender Denomination Church Attendance 56 1 7 4 46 2 6 5 49 2 6 5 49 1 1 5 27 2 9 5 51 1 4 2 47 2 2 3 67 1 5 4 49 2 2

    asked on January 28, 2014
  31. Physics

    A mass of 100g is attached to one end of a massless rod, 10cm in length, which is pivoted about the opposite end. The rod is held vertical, with the mass at the top, and released. The rod swings. A. What is the speed of the mass at the instant that the rod

    asked on November 10, 2014
  32. Social studies

    What is the basic independent unit of the world politics. A county B province C nation D organization****

    asked on September 12, 2016
  33. Chem 2

    what is the solubility of silver carbonate in water in 25 degrees celcius if Ksp=8.4X10-12? i don't know what to do Write the equation. Ag2CO3(s) ==> 2Ag^+ + CO3^= Ksp = (Ag^+2)(CO3^=) Let x = solubility of Ag2CO3. At equilibrium,(Ag^+) = 2x; (CO3^=) = x.

    asked on April 28, 2007
  34. Math

    An object is launched at 9.8 meters per second from a 73.5-meter tall platform. The object's height s (in meters) after t seconds is given by the equation s(t)= -4.9t(-4.9t) - 9.8t = 73.5. When does the object strike the ground? I can't figure out how to

    asked on March 11, 2016
  35. accounting

    What would you pay for a $50,000 debenture bond that matures in 15 years and pays $5,000 a year in interest if you wanted to earn a yield of: (Round computations to 2 decimal places and use the rounded amounts to calculate the final answer. Round the final

    asked on February 23, 2009
  36. Math

    In how many ways can a team of 5 players and a coach be chosen from 10 players and 5 coaches? How many of these teams will contain Alex, one of the player?

    asked on May 12, 2016
  37. Exponential Modeling

    Suppose a tortoise is 2000 feet from the ocean. Each day the tortoise travels one-half of the remaining distance to the ocean. Use this information to: Compute the remaining distance to the ocean after 4 days of travel.

    asked on May 1, 2016
  38. english

    What type of clause or phrase is italicized in the sentence below? The driver, confused by the sign, made a wrong turn.

    asked on May 10, 2012
  39. Math

    What is the probability that a randomly thrown dart hits a shaded region, given that the dart lands within the rectangle? All of the circles are congruent, and the diameter of each circle is 6 cm.

    asked on November 6, 2014
  40. Chemistry

    Calculate the pH at the equivalence point for the titration of 0.130M methalamine (CH3NH2) with 0.13M Hcl. The Kb of methyl amine is 5.0x10-4.

    asked on March 18, 2013
  41. Chemistry

    A 1" x 1" 1/8" copper ingot has a density of 8.94 g/mL. 25 pellets were obtained from the ingot. Explain what would be the density of each pellet. I went ahead and found the mass of the ingot which is 1.1175g but I'm still stumped on what to do from there.

    asked on February 1, 2016
  42. Physics

    A bowling ball rolls without slipping up a ramp that slopes upward at an angle (beta) to the horizontal. Treat the ball as a uniform, solid sphere, ignoring the finger holes. What is the acceleration of the center of mass of the ball? Express your answer

    asked on April 3, 2012
  43. 4th grade Math

    What is an expression that can be used to find 4 x 275 using mental math and properties of numbers?

    asked on November 18, 2014
  44. Chemistry

    in an experiment, ammonia gas, NH3(g) was bubbled through distilled water. Some of the dissolved ammonia gas, NH3, reacted with the water to form the aqueous ammonia ions, NH4. When red litmus paper was placed in contact with the aqueous solution, the

    asked on March 4, 2013
  45. Precalc

    Find a possible formula for the trigonometric function whose values are in the following table (note the values in the table may be slightly rounded): x 0.00 0.17 0.33 0.50 0.67 0.83 1.00 1.17 1.33 1.50 1.67 1.83 2.00 g(x) 4.00 5.50 6.60 7.00 6.60 5.50

    asked on November 9, 2017
  46. PreCalc

    Consider the tip of each hand of a clock. Find the linear velocity in millimeters per second for each hand. a. second hand which is 30 millimeters. b. minute hand which is 27 millimeters long. c. hour hand which is 18 millimeters long. Please tell me how

    asked on November 18, 2007
  47. physics

    HELP!You are handed a 8.0 cm stack of new one-dollar bills. Assume the thickness of a dollar bill is 1.4 times thicker than your textbook paper (textbook paper = 63 um). (that's "micrometers") How many dollars are in your stack?

    asked on January 20, 2011
  48. Math

    5 basketball teams play each other once. How many games are played?

    asked on October 15, 2015
  49. Algebra

    THe function h(t)=-16t^2+v0t+h0 describes the height in feet above the ground h(t) of an object thrown vertically from a height of h0 feet, with an initial velocity of v0 feet per second, if there is no air friction and t is the time in seconds sine the

    asked on April 19, 2010
  50. Math

    In a study of 800 men,diastolic blood pressure was found to be approximately normally distributed, with a mean of 84 millimeters (mm) of mercury and standard deviation of 10 millimeters. Use the 68-95-99.7% rule to determine what percentage of the test

    asked on December 15, 2016
  51. math

    Emma is using connecting cubes to make a rectangular model with a height of one connecting cube. With her cubes she can make the model in exactly 3 different ways. If Emma has more than 12 but fewer than 17 cubes, how many cubes does she have?

    asked on January 23, 2015
  52. Trig 2

    What is the smallest value for x where y = sin 2x reaches its maximum that means.

    asked on May 13, 2014
  53. Pre-Algebra

    A bag contains 10 white golf balls and 6 striped golf balls. A golfer wants to add 112 golf balls to the bag. He wants the ratio of white to striped golf balls to remain the same. How many of each should he add?

    asked on November 14, 2012
  54. math

    a particle starts at time t = 0 and moves along the x - axis so that its position at any time t is greater than or equal to zero is given x(t) = (t-1)^3(2t-3) A. Find the velocity of the particle at any time t greater than or equal to 0. B. For what values

    asked on November 15, 2012
  55. Microecon

    Juan mows lawns in his neighborhood for extra money. Suppose the demand for lawn mowing in Joe’s neighborhood is: QD = 48 – 2P and that the supply of lawn mowing (Juan’s willingness to mow lawns) is: Qs = -12 + P. The market-clearing price of lawn

    asked on April 25, 2015
  56. Chemistry

    The oxidation of iodide ion by arsenic acid, H3AsO4, is described by the balanced equation 3I−(aq)+H3AsO4(aq)+2H+(aq)→ I3−(aq)+H3AsO3(aq)+H2O(l) If −Δ[I−]/Δt = 4.8×10−4M/s , what is the value of Δ[I3−]/Δt during the same time interval?

    asked on October 5, 2014
  57. geometry

    in the diagram below of triangle abc, de is a midsegment of triangle abc, de=7, ab=10, and bc=13.find the perimeter

    asked on October 13, 2011
  58. Science

    You have a 31.5-volt batteries and a 1ohm, 2ohm, and 3ohm bulb. Draw a parallel circuit that has 2.5 A of total current. What would this look like?

    asked on May 5, 2019
  59. physics

    An electronic tracking device is placed on a police dog to monitor its whereabouts relative to the police station. At time t1 = 23 minutes, the dogs placement from the station is 1.2km, 33 degrees north of east. At time t2=57 minutes, the dog's

    asked on July 8, 2008
  60. physics

    A science museum has asked you to design a simple pendulum that will make 25.0 complete swings in 85.0 {\rm s}. How long should the pendulum be? in meters

    asked on February 29, 2012
  61. algebra

    The sum of a number and three times another number is 18. Find the number if their product is a maximum.

    asked on March 18, 2015
  62. pre-algebra

    write an inequality for the sentence. The total t is greater than five. Well your answer is going to be T and the sign for greater than is simply >. So the answer would be T > 5 ok again my name is above. i was just wondering what pre-algebra was? i mean i

    asked on March 9, 2007
  63. physics

    A wheel of diameter 28.0 cm is constrained to rotate in the xy plane, about the z axis, which passes through its center. A force = (-38.0 + 39.0 ) N acts at a point on the edge of the wheel that lies exactly on the x axis at a particular instant. What is

    asked on January 2, 2012
  64. chemistry

    3.05 g hydrated copper sulfate produces 1.94 g of anhydrous salt.Assuming complete removal of all water of crystallisation,determine tha formula of hydrated copper sulfate.

    asked on March 2, 2017
  65. physics

    If the acceleration due to gravity on the earth is 9.8 m/s2, what is the acceleration due to gravity on Rams?

    asked on December 4, 2014
  66. Math

    How do you write this equation in logarithmic form? 125^(4/3)=625

    asked on January 5, 2019
  67. 1

    A student witnesses a flash of lightning and then t = 6.5 s later the student hears the associated clap of thunder. Sound travels at 343 m/s in the air. What distance from the student is the lightning strike, in meters?

    asked on September 11, 2014
  68. Chemistry

    What is the full net ionic equation for each reaction? do they form a precipitate or have a color change? CuSO4+AgNO3 CuSO4+BaCl2 CuSO4+Cu(NO3)2 CuSO4+Pb(NO3)2 CuSO4+KI CuSO4+Na2S2O3 AgNO3+BaCl2 AgNO3+Cu(NO3)2 AgNO3+Pb(NO3)2 AgNO3+KI AgNO3+Na2S2O3

    asked on May 27, 2008
  69. Electric Power Tools

    I need help with my test, I don't know if they are all right or not. I answered the questions to the best of my ability. My answers are marked with an *. 1. What is the typical no-load speed of a high-speed drill? A. 1,000 rpm *B. 2,500 rpm C. 3,000 rpm D.

    asked on December 15, 2011
  70. math

    what do you call it when someone pays back a loan quickly

    asked on March 9, 2009
  71. Math

    In a card game player get at the start 2 green cards, 3 blue cards, 4 red cards, and 3 yellow cards. In how many ways can the player get cards at the start if this card game has 7 green, 7 blue, 10 red and 10 yellow cards?

    asked on May 12, 2016
  72. Chemistry

    In a 1.0× 10–2 M solution of CH3NH3Br(aq), identify the relative molar amounts of these species. H2O, OH-, CH3NH3+, CH3NH2, H3O+, Br-, HBr

    asked on March 28, 2016
  73. 2

    A student witnesses a flash of lightning and then t = 6.5 s later the student hears the associated clap of thunder. Light travels at 3.0 × 108 m/s in the air. How long, t1, in seconds did it take the light to reach the student's eyes after the flash?

    asked on September 11, 2014
  74. physics

    A potter's wheel is rotating around a vertical axis through its center at a frequency of 1.8rev/s . The wheel can be considered a uniform disk of mass 4.7kg and diameter 0.34m . The potter then throws a 3.1kg chunk of clay, approximately shaped as a flat

    asked on March 17, 2014
  75. Chemistry

    What osmotic pressure in atmospheres would you expect for a solution of 0.150M CaCl2 that is separated from pure water by a semipermeable membrane at 310 K? Assume 100% dissociation for CaCl2 Any help is appreciated, thank you!

    asked on September 21, 2014
  76. Chemistry

    If the edge length of an NaH unit cell is 488pm, what is the length (in picometers) of an Na−H bond? Na−H has face-centered cubic unit cell. Please help

    asked on September 14, 2014
  77. Chemistry

    the half-life of cobalt-60 is 5.20 years.. how many milligrams of a 2.000-mg sample remains after 6.55 years

    asked on October 8, 2012
  78. English

    In The Importance of Being Earnest, Jack and Algernon clearly have a preoccupation with food. Discuss how food serves as a symbol for obedience to impulse and the pursuit of pleasure. How does this symbol help Oscar Wilde to comment on and satirize

    asked on February 11, 2016
  79. science

    a)why do chemist prefer to read/ record the absorbance, rather that the percent transmittance, of light when analyzing a sample having a visible color? b) three parameters affect the absorbance of a sample. Which one is the focus of this experiment?

    asked on January 31, 2011
  80. Math

    Suppose that the weather forecast calls for a 30% chance of rain on each of the three days of a long weekend. What are the odds in favour of no rain throughout the entire long weekend? Claudia and Ally are the two favourites to win an upcoming golf

    asked on June 19, 2017
  81. Mathematics

    OPQRS is a right pyramid whose base is a square of sides 12cm each. Given that the slant height of the pyramid is 15cm. Find the height of the pyramid, the volume of the pyramid, and the total surface area of the pyramid by first drawing the net of the

    asked on February 11, 2012
  82. Physics

    With a 1220–W toaster, how much electrical energy is needed to make a slice of toast (cooking time = 1.3 minute)? At 12.1 cents/kW·h, how much does this cost? (You do not need to enter any units.)

    asked on September 13, 2014
  83. Physics

    A 50 g ice cube can slide without friction up and down a 32° slope. The ice cube is pressed against a spring at the bottom of the slope, compressing the spring 10.16 cm. The spring constant is 22 N/m. When the ice cube is released, what distance will it

    asked on September 28, 2011
  84. math

    The population of Circletown has been growing at an annual rate of 5% for the last 5 years. The population is now 3104 people. What was the population of Circletown 5 years ago?

    asked on December 4, 2017
  85. Math

    Trail mix is sold in 1 pound bags Mary will buy some trail Mix and repackage it so that each of the 15 members of her hiking club gets one 2/5 pound bag how many 1 pound bags of trail mix should mary buy to have enough trail Mix without leftovers

    asked on February 4, 2014
  86. physics

    A fulcrum is placed under the center of a uniform 4.00m long, 3.00kg board. Child A has a mass of 42 kg. This child sits on the left end of the board; Child B has a mass of 26kg. Child B sits on the right end of the board. Where should child C (mass 21 kg)

    asked on November 4, 2012
  87. PreCalc - Vectors

    An airplane is flying with an airspeed of 660 Kilometers per hour. The wind is blowing from 345 degrees at 35 km/h. What direction should the airplane take so that, with the wind, the plane will be flying in a direction of 72 degrees? I can compute

    asked on May 3, 2011
  88. Physics

    The figure below shows an electron passing between two charged metal plates that create an 115 N/C vertical electric field perpendicular to the electron’s original horizontal velocity. (These can be used to change the electron’s direction, such as in

    asked on August 22, 2014
  89. Differential Equations

    A tank originally contains 5 lb of salt dissolved in 200 gal of water: Starting at time t=0, a salt solution containing 0.10 lb/gal is to be pumped into the tank at a constant rate and the well-stirred mixture is to flow out of the tank at the same rate.

    asked on September 17, 2012
  90. physics

    a 1000 kg truck traveling at a speed of 40m/s skids to a halt on wet concrete where µk = 0.60. how long are the skid marks? (Please explain all variables and equations I'm clueless in this subject) I keep trying to use the equation I found online: d=

    asked on October 20, 2016
  91. Physics

    At the Earth's surface, a projectile is launched straight up at a speed of 9.9 km/s. To what height will it rise? Ignore air resistance and the rotation of the Earth. _____m

    asked on April 29, 2014
  92. Chemistry

    1) Frank and Oswalt report a molar absorptivity of 4700 L mol^-1 cm^-1 for thiocyanatoiron(lll) ion. What absorbance would you expect for a soloution that it 1.0e-4 M in thiocyanatorion(lll) ion, if the path length is 1.00 cm? 2) At a given temperature,

    asked on February 19, 2013
  93. History

    What did the founders of the United States consider when creating the national government?

    asked on January 16, 2019
  94. Math

    What is the basic independent unit of the world politics. A county B province C nation D organization****

    asked on September 12, 2016
  95. Chemistry

    What [PB2+] should be maintained in Pb(NO3) to produce solubility of 1.0*10^-4 mol PbI2/L when PbI2 (s) is added? Ksp for PbI2 is 7.1*10^-9 I can't figure it out...

    asked on April 21, 2013
  96. Algebra

    Ellen is 11 years older than Maja. Last year Ellen was twice as old as Maja. How old is Maja now?

    asked on February 25, 2013
  97. Chemistry

    What is the full net ionic equation for each reaction? do they form a precipitate or have a color change? CuSO4+AgNO3 CuSO4+BaCl2 CuSO4+Cu(NO3)2 CuSO4+Pb(NO3)2 CuSO4+KI CuSO4+Na2S2O3 AgNO3+BaCl2 AgNO3+Cu(NO3)2 AgNO3+Pb(NO3)2 AgNO3+KI AgNO3+Na2S2O3

    asked on May 27, 2008
  98. Calculus

    On a certain clock the minute hand is 4 inches long and the hour hand is 3 inches long. How fast is the distance between the tips of the hands changing at 4 pm?

    asked on November 16, 2008
  99. Physics

    Matt is attempting to sail a sailboat northeast across the river with a velocity of 13 m/s relative to the current of water. The water current is flowing from south to north at a velocity of 6 m/s. If the angle between the velocity of the sailboat and the

    asked on September 19, 2017
  100. physics

    The objects listed below are placed at the top of a ramp, and roll down to the bottom without slipping. Assuming that there is no air resistance, rank them in order from fastest average rolling speed to slowest. Penny, large marble, basketball, and hula

    asked on March 28, 2018


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