# Search results

1. ### A tank of compressed air

A tank of compressed air of volume 1.0 m^3 is pressurized to 50 atm at T = 273 K. A valve is opened and air is released until the pressure in the tank is 17 atm. How many air molecules were released? I tried this problem using PV = NkT and PV = nRT. I realize the difference in these...
2. ### Angular Acceleration of a Moving Wheel

I looked at that website and this is what makes sense to me: 8.5 rev * 2pi = 53.41 radians 53.41 rad / 4.6 sec = 11.61 rad/sec (omega) 11.61 rad/sec / sec = 2.5 rad/sec^2 2.5 is the wrong answer when I entered it. I am out of ideas.
3. ### Angular Acceleration of a Moving Wheel

Angular Acceleration The definition of angular acceleration is angular velocity over time. So, to get angular velocity from 8.5 rev/4.6 sec you have to find the angular velocity first. So, the definition of angular velocity (omega) is angular displacement over time, and the angular displacement...
4. ### Angular Acceleration of a Moving Wheel

I am having a bit of trouble with the following problem. A cyclist starts from rest and pedals so that the wheels make 8.5 revolutions in the first 4.6 s. What is the angular acceleration of the wheels (assumed constant)? I multiplied 8.5 by 2pi and then divided by 4.6 sec. I get an answer...
5. ### Angular Acceleration of a Moving Wheel

I am having a bit of trouble with the following problem. What should I do to start? A cyclist starts from rest and pedals so that the wheels make 8.5 revolutions in the first 4.6 s. What is the angular acceleration of the wheels (assumed constant)?