Apiston-cylinder device contains helium gas initially at 150 kpa, 20 o c, and 0.5m 3 . the helium is now compressed in a polytropic process () to 400 kpa and 140 o c. determine the work and heat transfer done during this process.

What does si stand for, when referring to a system of measurement

Atank is filled with an ideal gas at 400 k and pressure of 1.00 atm . part a the tank is heated until the pressure of the gas in the tank doubles. what is the temperature of the gas?

Asled is being held at rest on a slope that makes an angle θ with the horizontal. after the sled is released, it slidesa distance d1 down the slope and then covers the distance d2 alongthe horizontal terrain before stopping. find the coefficient ofkinetic friction μk between the sled and the ground, assumingthat it is constant throughout the trip. find the coefficient of kinetic frictionμk. express your answer in terms of someor all of the variables d1, d2, and θ.