Recent content by amdma2003

I don't understand how the weight of the piston affects the pressure. I thought since the piston is free to move up and down, the pressure is just mg/A.

Homework Statement Two 800 cm^{3} containers hold identical amounts of a monatomic gas at 20 deg C. Container A is rigid. Container B has a 100 cm^{2} piston with a mass of 10 kg that can slide up and down vertically without friction. Both containers are placed on identical heaters and...

Thanks for directing me to the First Law of Thermodynamics. I have never thought of using the relationship. However, for the record, I did realize that it should be C_p not C_v as it is the specific heat of the gas at constant pressure.

Homework Statement 5.00 g of nitrogen gas at 22.0 deg C and an initial pressure of 2.00 atm undergo an isobaric expansion until the volume has tripled. A. How much heat energy is transferred to the gas to cause this expansion? Homework Equations Equation of Isobaric thermodynamic: W...

Ok, thanks. The torque of the beam is mgl/2. Thats what I forgot.

The sum of the torque is T1+T2, and the person is standing at the edge of the beam. I do know the torque of the person standing at the edge, which is 2.9 * 71 * 9.8 = 2017.82 however, I do not know how to find the torque of the beam.

This is the problem I have with the question with a beam with mass. Homework Statement A 2.90 -m-long, 390 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 71.0 kg construction worker stands at the far end of...