A balloon is fitted over the open end of a glass beaker that contains water. The beaker is placed over a flame, which heats the water. At the same time,
the balloon is squeezed, so that it deflates. What are the correct signs for the
heat and work changes to the beaker and balloon system?
A. -Q, +W
B. -Q, -W
C. +Q, +W
D. +Q, -W

An observer that stands still as the electron moves by him, will observe

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat