# Search results

1. ### Thermodynamics problem help again

Sorry for the second question in just a day, but my proffessor really didn't cover this material very well. Thanks for any help given :). A cylinder contains 4.22 mol of helium gas at a temperature of 314 K. The molar specific heat of helium at constant volume is 12.5 J/K mol. How much...
2. ### Thermodynamics problem: help needed

Thermodynamics problem: help needed!!! Gas in a container expands at a constant pressure of 95 atmospheres. Find the work done by the gas if the initial volume is 5 L and the final volume is 10 L. Answer in units of Joules. I thought this problem was straight-forward, but I missed it. I...
3. ### Pressure and Net Force Question

I'm working on my homework, and I have finished all the problems save for one. I think I am on the right track, but I'm lacking just a few bits of info. Here is the question (it has 2 parts, I have answered the first part correctly, but cannot get the second part correct). Part 1...
4. ### Unit kN? What is it?

Unit kN???? What is it??? I have a question asking for the tension in a cable that supports a beam. It asks me to find the answer in kN. What is kN? I know how to solve the problem, but I have no idea what this unit is.....What is k? Figure at the bottom in an attachment. For the...
5. ### Torque and Tension of two weights

Guys - I'm back again :rofl: . I hate to have so many questions, but I really appreaciate all the help you guys give me. For this problem, I am having some problems with the clockwise/counterclockwise Torque rule. Anyways, let me give you the problem and work. Two weights attached to a...
6. ### Rotational speed versus linear motion problem

Here is the question: The speed of a moving bullet can be determined by allowing the bullet to pass through two rotating paper disks mounted a distance 0.921 m apart on the same axle. From the angular displacement 27.4 degrees of the two bullet holes in the disks and the rotational speed...
7. ### I need help with a collision problem

The question is as follows: A 4g particle moving at 30 m/s collides with a 0.99 g particle initially at rest. After the collision the two particles have velocities that are directed 27 degrees on either side of the original line of motion of the 4 g particle. What is the speed of the 0.99 g...