# Janie

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

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

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

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

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

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?

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?

8. ## Chemistry

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

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.

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

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?

12. ## Chmistry

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

13. ## algebra

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

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

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

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

17. ## math

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

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?

19. ## social studies

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

20. ## Spanish

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

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?

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?

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

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?

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

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

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?

28. ## CONFUSED~MATH

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

29. ## chemistry

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

30. ## pysics

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

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. =)

32. ## algebra

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

33. ## Math

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

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?

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?

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?

37. ## science

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

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 

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

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.

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!

42. ## spelling

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

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

44. ## math

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

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

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?

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

48. ## algebra

what numbers are multiples of 3

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?

1. ## Math

ok, I did nothing worng

posted on November 14, 2018
2. ## Physics

3.7

posted on September 4, 2017
3. ## History

it is c you silly appreciated help

posted on May 17, 2016

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

family.

posted on May 2, 2014
7. ## geometry

rhe

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