I have tried this problem a few ways, and I am getting frustrating results. Could you help me out by showing me how to set the systems of equations Two angles are complementary The sum of the measure of the first angle and 1/4 the second angle is 82.5. Find the measure of the ...
December 20, 2009
A softball of mass 0.220 kg that is moving with a speed of 6.5 m/s (in the positive direction) collides head-on and elastically with another ball initially at rest. Afterward it is found that the incoming ball has bounced backward with a speed of 4.8 m/s. Calculate the mass of...
December 9, 2009
physics - PLEASE HELP
A vertical spring (ignore its mass), whose spring constant is 980 N/m, is attached to a table and is compressed 0.160 m. (a) What speed can it give to a 0.400 kg ball when released? (b) How high above its original position (spring compressed) will the ball fly?
November 24, 2009
physics - please help
A 0.455 kg wood block is firmly attached to a very light horizontal spring (k = 160 N/m). It is noted that the block-spring system, when compressed 5.0 cm and released, stretches out 2.3 cm beyond the equilibrium position before stopping and turning back. What is the ...
November 23, 2009
you are the ceo of an Explosive company you hired an explosive expert named john and your paying john the explosion expert at $24.50 an hour while on the job there was an explosion that blew john 1 mile into the air as ceo you decide to dock his pay for how long he was in the ...
November 10, 2009
A sled slides down a snow-covered hill at CONSTANT SPEED. If the hill makes an ANGLE of 10degrees ABOVE THE HORIZONTAL, WHAT IS THE COEFFICIENT OF KINETIC FRICTION BETWEEN THE SLED AND THE SNOW? ~>HELP!
October 19, 2009
According to the law of universal gravitation, there is force of attraction between any two bodies in the universe, WHY CAN'T YOU FEEL THIS FORCE BETWEEN YOU AND YOUR SEATMATE? ~>Thanks for those who are helping!
October 19, 2009
A 1.50x10cube is going up a road inclined at 10degrees. If the coefficient of friction is 0.7. Determine the force that will move the car up the inclined with a constant speed. Given: m=1.50x10cube angle=10degrees coefficient=0.7 Required: F=? PLEASE HELP..
October 15, 2009
The mass of a certain planet is six times the mass of the earth and the diameter of the planet is twice the diameter of the earth. Find the acceleration od gravity on the surface of this planet. HELP ME SOLVE! THANKS!
October 15, 2009
A 25 kg object accelerates from rest to a 0.45 m/s in 1.3 seconds. If the coefficient of friction between the object and the floor is 0.15. Find the force that can accelerate it. I don't know how to derieve the formula for this one..please help.. FROM the FORMULA: -netF=Ff-Fx
October 14, 2009
A window washer pulls herself upward using the bucket-pulley apparatus shown in Fig. 4-42. The mass of the person plus the bucket is 69 kg.How hard must she pull downward to raise herself slowly at constant speed?If she increases this force by 11 percent, what will her ...
October 13, 2009
Forgot I need 5 yes and no reasons. I currently have 2 yes and 2 no. Which are: YES - containment prevented U.S. from interfering with nations already fallen to Communism preventing possible 3rd World War or Nuclear War by Soviets. YES - it stopped the spread of Communism. NO...
October 1, 2009
6th Grade Math
I just need some direction to get started please.... Some family friends have asked you to plan a rafting expedition. A rafting has given you specific details on how much weight a raft can hold. A raft can safely carry the weight of 24 babies. The weight of 12 babies is ...
February 3, 2009
It asks for the problems faced by both sides, it is as in they city will not have people collecting garbage, and the collectors won't have their paychecks? What else? other suggestions?
November 15, 2008
I am kind of stuck on this question, I need some ideas or suggestions, thanks. Garbage collectors (belongs to a union) in a town wants higher pay (eg 17%),but the mayor know that there is no way that taxpayers will accept a settlement near that. What are some of the problem ...
November 15, 2008
what material can we use as an indicator of acid?in other words,what material can we use to test a food to see if acid is present? what is the relationship between the concentration of acid in a liquid and the amount of carbon dioxide produced?
October 15, 2008
(population) A normal distribution has a mean of 80 and a std dev of 20. For each of the following scores, indicate wheter the tail of the distribution is located to the right or left of the score, and find the proportion of the distribution located in the tail. a.X=85, B.X=92...
February 7, 2008
Question about PC's
i have a question on my assignment that I donot understand. Which high performance processor is the fastest Pentium4 or Itanium4? I know there is an Itanium2. But, there isn't a Itanium4 is there? So, wouldn't Pentium4 be the fastest? Yes, the Pentium 4 at 3.2 Ghz is ...
June 18, 2007
On a credit card, minimum monthly payments are often about 2% of the balance. If no interest were charged, how long would it take to pay off a loan when payments are 2% of the balance? With no minimum, almost infinite time. Lets get to when he owes ten cents. Two percent of ...
March 25, 2007
COMPOUND 1 CH2=CH-CH-OH ________| _______CH3 COMPOUND 2 _____________O ____________// CH3-CH-CH2-C _____|______\ ____CH3______OH *Now, I must: Identify any functional groups in these compounds and name them. The functional group in 1 is the OH which makes it an alcohol. (It is...
February 7, 2007