An ideal gas with γ = 1.4 is subjected to the following cyclic process, whose starting point is characterized by p1 = 245 kPa, V1 = 2.19 L: 1. adiabatically expand until the pressure becomes p2 = 16.8 kPa, at which
point the volume has some value V2; 2. isobarically (=constant pressure) reduce the volume back to V1; 3.
isochorically (=constant volume) increase the pressure back to p1.
(a) What value does V2 have?
(b) Draw a p-V diagram for this cyclic process. Make sure you label all important parts of it.
(c) What is the net work done on the gas for the whole cyclic process?
(Careful! It’s on the gas, not by the gas.)

First, launch the video below. you will be asked to use your knowledge of physics to predict the outcome of an experiment. then, close the video window and answer the question at right. you can watch the video again at any point. part a as in the video, we apply a charge +q to the half-shell that carries the electroscope. this time, we also apply a charge –q to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? view available hint(s) as in the video, we apply a charge + to the half-shell that carries the electroscope. this time, we also apply a charge – to the other half-shell. when we bring the two halves together, we observe that the electroscope discharges, just as in the video. what does the electroscope needle do when you separate the two half-shells again? it deflects more than it did at the end of the video. it deflects the same amount as at end of the video. it does not deflect at all. it deflects less than it did at the end of the video. submit

Aball with a mass of 275 g is dropped from rest, hits the floor and rebounds upward. if the ball hits the floor with a speed of 2.40 m/s and rebounds with a speed of 1.70 m/s, determine the following. (a) magnitude of the change in the ball's momentum (let up be in the positive direction.)

In one or two sentences, describe how you did in the balancing game. in a few more sentences, explain one strategy you learned for balancing more complex equations.