Most popular questions and responses by Janie
  1. physics

    You push a box along the floor against a constant force of friction. When you push with a horizontal force of 75 N the acceleration of the box is 0.55 m/s2; when you increase the force to 85 N the acceleration is 0.78 m/s2. (a) Find the mass of the box. kg

    asked on February 13, 2010
  2. physics

    C Exercise 3.57 In laboratory situations, a projectile’s range can be used to determine its speed. To see how this is done, suppose a ball rolls off a horizontal table and lands 1m out from the edge of the table. Part A If the tabletop is 70cm above the

    asked on September 29, 2014
  3. Chem

    If 4.70 mol of calcium carbide (CaC2) reacts with an excess of water, how many moles of acetylene (C2H2), a gas used in welding, will be produced? CaC2(s) + 2 H2O(l) Ca(OH)2(aq) + C2H2(g) mol

    asked on May 18, 2017
  4. Math

    I cannot figure this one out. Please help. The ramp shown below is used to move crates of apples to loading docks at different heights. When the horizontal distance AB is 12 feet, the height of the loading dock, BC, is 6 feet. What is the height of the

    asked on November 14, 2018
  5. Reading

    Imagine you were a teacher beginning employment at a school or early childhood program. What kind of guidance, support, and training do you feel you need to become comfortable and capable in areas of working with families

    asked on May 4, 2016
  6. physics

    An astronaut exploring a distant solar system lands on an unnamed planet with a radius of 2520 km. When the astronaut jumps upward with an initial speed of 2.94 m/s, she rises to a height of 0.83 m. What is the mass of the planet?

    asked on May 31, 2010
  7. physics

    Suppose a rocket launches with an acceleration of 33 m/s2. What is the apparent weight of an 65 kg astronaut aboard this rocket?

    asked on January 13, 2010
  8. Chemistry

    Sulfur dioxide gas is bubbled through sodium hydroxide solution Write the balanced formula equation for this reaction

    asked on April 12, 2011
  9. physics

    In the early morning hours of June 14, 2002, the Earth had a remarkably close encounter with an asteroid the size of a small city. The previously unknown asteroid, now designated 2002 MN, remained undetected until three days after it had passed the Earth.

    asked on May 31, 2010
  10. physics

    When you push a 1.95 kg book resting on a tabletop it takes 2.40 N to start the book sliding. Once it is sliding, however, it takes only 1.50 N to keep the book moving with constant speed. What are the coefficients of static and kinetic friction between

    asked on February 13, 2010
  11. physics

    You pull upward on a stuffed suitcase with a force of 116 N, and it accelerates upward at 0.778 m/s2. (a) What is the mass of the suitcase? (b) What is the weight of the suitcase?

    asked on January 13, 2010
  12. Chmistry

    A sample of copper with a mass of 63.5g contains 6.02x10^23atoms.Calculate the mass of a single copper atom.

    asked on October 11, 2010
  13. algebra

    The sum of six times a number and 1 is equal to five times the number

    asked on June 18, 2014
  14. physics

    A 10.4 kg child sits in a 4.1 kg high chair. (a) Find the normal force exerted by the chair on the child. N (b)Find the normal force exerted by the floor on the chair. kN

    asked on January 14, 2010
  15. Chemistry

    I have the question find the balanced equation when Fe(s) is placed in HClO4 (aq). How do I balance this redox reaction? I'm not entirely sure its right but the unbalanced equation I have so far is Fe (s) + HClO4 (aq) -->Fe(ClO4)3 + H2 I'm not sure what to

    asked on October 10, 2014
  16. math

    Mr.Edwards is now three times as old as his daughter, in 15 years' time the sum of their ages will be 86. a.)How old are they both now? b.)How old was Mr.Edwards when his daughter was born? Write and solve an algebraic equation or inequality for this

    asked on May 20, 2013
  17. math

    how do i express each ratio as a fraction in simplest form?

    asked on April 28, 2011
  18. Trig

    2cos^2Beta-Cosbeta=0 (find all solutions for the equation in the interval 0, 2 pi). I have no idea how to go about doing this. Do you isolate the beta on one side? Would you be able to show me how and I'll solve for you to check?

    asked on January 24, 2010
  19. social studies

    What is the water feature that is most holy in the Hindu tradition believed to flow from heaven?

    asked on March 11, 2008
  20. Spanish

    Rewriting this sentence in DIRECT OBJECT PRONOUNS. -Vamos a ver a mi actor favorito en el teatro.

    asked on March 3, 2010
  21. Finance mangement

    What type of cost measurements best fit in health care and which do not? How do cost measurement techniques vary with regard to the operating budget, capital budget, and variance analysis?

    asked on December 8, 2011
  22. Trigonometry

    A=30 degrees, a=9 and b=8. Find the missing sides/angles. I did cos39=x/8 and reduced that to 8cos39=x. I got 6.92. But that's not a valid answer, so I can't go from there. What did I do wrong? Can you show me how to get the other answers as well, please?

    asked on January 24, 2010
  23. physics

    Jason drives due west with a speed of 55.0km/hr for 30.0 min, then continues in the same direction with a speed of 95.0km/hr for 2.00 hr, then drives farther west at 40.0km/hr for 10.0 min. What is the magnitude of Jason's average velocity

    asked on September 27, 2011
  24. History

    What factors make it more likely that a bill will become law? What factors make it less likely? Is it easy or difficult to pass a bill? What are some of the advantages of passing legislation quickly? What are some of the disadvantages?

    asked on August 12, 2009
  25. Math

    Okay i think i understand this wrod problem but i need help this is the problem: keith weighs 200 pounds. He wants to weigh less than 175 pounds. If he can lose an average of 2 pounds per a week on a certain diet, how long should he stay on his diet to

    asked on March 16, 2008
  26. calc

    The equation below describes the motion of a particle (s = position in feet, t = time in seconds). Find the INSTANTANEOUS VELOCITY at each time given. s = 1 / (t2 + 1) at time 2 seconds

    asked on December 18, 2015
  27. chem

    Excess Ag+ is added to 50 mL of NaBr soln and precipitated out 22.8 mg of AgBr. What is the original concentration of Br- ion in the solution in ppm?

    asked on October 26, 2010

    if f(x) = (x/7)-3 find f^-1(x) I'm completely lost! Help

    asked on August 24, 2010
  29. chemistry

    What is the molar volume of H2 at 1.50 atm and -25 degrees celcius?

    asked on April 22, 2010
  30. pysics

    What is derivation? How does derivation differe from an experiment or theory?

    asked on August 26, 2007
  31. english

    what is the literacy term called when the mood of a novel matches the weather? Isn't it sunny? You might try this literary terms website: http://web.cn.edu/kwheeler/lit_terms_M.html Scroll down until you reach MOOD. =)

    asked on September 29, 2006
  32. algebra

    reduce to lowest terms: 3n+9 ____ n+3

    asked on October 5, 2013
  33. Math

    Please explain how to solve this problem. 7x-6/3 + 4(8+2x)

    asked on April 8, 2013
  34. Algebra

    2006, 74.2 million tax returns were filed electronically. This represents a 108.8% increase over the year 2005. How many income tax returns were filed electronically in 2005?

    asked on August 26, 2012
  35. statistics

    The camp dining room has two tables. One that seats 10ppl & the other seats 8ppl. If 4pizzas are placed on the large table & 3 pizzas are placed on the small table. Will both tables recv the same amt of pizzas? How do you solve this equation?

    asked on February 3, 2012
  36. entrepreneur

    Can someone who is a leader not be a manager? Why or why not? Can someone who is a manager not be a leader? Why or why not?

    asked on November 16, 2011
  37. science

    home challenge iron in cereal. What happens when water is added to total cereal

    asked on November 9, 2011
  38. Maths

    Rodney and Rebecca play chess together. In the last 50 games, Rodney has won 18 games. If they played a further 75 games, how many would Rebecca expect to win Working out please 

    asked on April 9, 2011
  39. chem buffer

    When the following solutions are mixed, which will act as a buffer? (check all that apply) A. 50 mL of 0.05M sodium hydroxide and 50 mL of 0.1M nitrous acid B. 50 mL of 0.1M ammonia and 50 mL of 0.1M ammonium acetate C. 50 mL of 0.1M ammonia and 50 mL of

    asked on October 29, 2010
  40. physics

    In the early morning hours of June 14, 2002, the Earth had a remarkably close encounter with an asteroid the size of a small city. The previously unknown asteroid, now designated 2002 MN, remained undetected until three days after it had passed the Earth.

    asked on May 31, 2010
  41. Chemistry

    What is the wavelength of radiation that has a frequency of 5.8 X 10^12 s-1? I keep getting 5.17e19 but it keeps saying that's wrong. Help!

    asked on March 11, 2010
  42. spelling

    four letter word for legs? must be a plural and start with f.

    asked on January 27, 2010
  43. Unit Rates

    Find each unit rate. - 20 mi in 5 h - 78 mi on 3 gal Please and thank-you Convert the first pair of number to miles per minute, using division. Convert the second pair of numbers to miles per gallon, using division. Convert the first pair of number to

    asked on January 10, 2007
  44. math

    write the expression for the perimeter of a rectangle with a length that is 5 inches longer than its width

    asked on August 10, 2013
  45. math

    a=b+c-2 a=c-d+9 a=b-d+11 Based on the system of equations above, what is the value of a? a) 2 b) 9 c) 10 d) 11 e) 20

    asked on July 12, 2012
  46. statistics

    The camp dining room has two tables. One that seats 10ppl & the other seats 8ppl. If 4pizzas are placed on the large table & 3 pizzas are placed on the small table. Will both tables recv the same amt of pizzas? How do you solve this equation?

    asked on February 3, 2012
  47. Physics

    An engineer needs to determine the distance across a rive whose banks are approx. parallel. Standing on one side of the bank, the engineer can see the other side. The engineer only has a 30 foot measuring tape ( which is shorter than the distance from one

    asked on September 29, 2011
  48. algebra

    what numbers are multiples of 3

    asked on August 24, 2011
  49. accounting

    if direct material is 6.69, direct labor 3.33, variable overhead 1.27, and fixed overhead .088. if your producing 2400 units what is your total fixed cost and what is the variable cost per unit?

    asked on April 29, 2011
  1. Math

    ok, I did nothing worng

    posted on November 14, 2018
  2. Physics


    posted on September 4, 2017
  3. History

    it is c you silly appreciated help

    posted on May 17, 2016
  4. Reading

    Get some ideas

    posted on May 5, 2016
  5. physics (Newton's Laws)

    A) 0 B) .5 C)-.5

    posted on March 15, 2015
  6. Government


    posted on May 2, 2014
  7. geometry


    posted on October 16, 2011
  8. physics

    unfortunately those calculations didn't work, its saying my answer varies significantally

    posted on May 31, 2010
  9. physics

    thank you

    posted on February 13, 2010
  10. Trig

    I thought cos=1/2 at 30, not 60

    posted on January 24, 2010
  11. History

    The factors that make a bill come a law is bankruptcy protection could find it much harder to escape their debts if a bill recently passed by the U.S. House of Representatives is signed into law. For the second question is it easy or difficult I think it's

    posted on August 12, 2009
  12. History

    ok that will work I will just post what I think is best then we can go from there, but I was thought someone might give me a hint only not the answers. Thanks Ms. Sue

    posted on August 12, 2009
  13. Math

    This question seems to be easy Karl, but yeah Reiny is right show us what you have done so far then we will go from there.

    posted on August 12, 2009
  14. Math

    First you subtract 172.41 from 15.99 b/c you want to know how many miles he drove without the fee first which I came up with 156.42. So I'm assuming that he drove 198 miles. To check your answer 198 x.79=156.42 + 15.99=172.41

    posted on August 12, 2009
  15. Math

    Thanks emily and jimmy for your help

    posted on March 17, 2008