Janie
Most popular questions and responses by Janie
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 
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 
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 
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 
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 
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 
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 
Chemistry
Sulfur dioxide gas is bubbled through sodium hydroxide solution Write the balanced formula equation for this reaction
asked on April 12, 2011 
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 
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 
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 
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 
algebra
The sum of six times a number and 1 is equal to five times the number
asked on June 18, 2014 
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 
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 
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 
math
how do i express each ratio as a fraction in simplest form?
asked on April 28, 2011 
Trig
2cos^2BetaCosbeta=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 
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 
Spanish
Rewriting this sentence in DIRECT OBJECT PRONOUNS. Vamos a ver a mi actor favorito en el teatro.
asked on March 3, 2010 
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 
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 
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 
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 
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 
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 
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 
CONFUSED~MATH
if f(x) = (x/7)3 find f^1(x) I'm completely lost! Help
asked on August 24, 2010 
chemistry
What is the molar volume of H2 at 1.50 atm and 25 degrees celcius?
asked on April 22, 2010 
pysics
What is derivation? How does derivation differe from an experiment or theory?
asked on August 26, 2007 
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 
algebra
reduce to lowest terms: 3n+9 ____ n+3
asked on October 5, 2013 
Math
Please explain how to solve this problem. 7x6/3 + 4(8+2x)
asked on April 8, 2013 
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 
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 
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 
science
home challenge iron in cereal. What happens when water is added to total cereal
asked on November 9, 2011 
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 
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 
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 
Chemistry
What is the wavelength of radiation that has a frequency of 5.8 X 10^12 s1? I keep getting 5.17e19 but it keeps saying that's wrong. Help!
asked on March 11, 2010 
spelling
four letter word for legs? must be a plural and start with f.
asked on January 27, 2010 
Unit Rates
Find each unit rate.  20 mi in 5 h  78 mi on 3 gal Please and thankyou 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 
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 
math
a=b+c2 a=cd+9 a=bd+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 
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 
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 
algebra
what numbers are multiples of 3
asked on August 24, 2011 
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

Math
ok, I did nothing worng
posted on November 14, 2018 
Physics
3.7
posted on September 4, 2017 
History
it is c you silly appreciated help
posted on May 17, 2016 
Reading
Get some ideas
posted on May 5, 2016 
physics (Newton's Laws)
A) 0 B) .5 C).5
posted on March 15, 2015 
Government
family.
posted on May 2, 2014 
geometry
rhe
posted on October 16, 2011 
physics
unfortunately those calculations didn't work, its saying my answer varies significantally
posted on May 31, 2010 
physics
thank you
posted on February 13, 2010 
Trig
I thought cos=1/2 at 30, not 60
posted on January 24, 2010 
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 
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 
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 
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 
Math
Thanks emily and jimmy for your help
posted on March 17, 2008