Consider two identical particles of massm, initially at rest and separated by distanced0(a) Find an analytic expression for the time needed for the two particles to reach a the influence of mutual gravitational attraction. (This is the continuation ofthe example begun in lecture.)(b) Evaluate this time for the problem that you considered in p-set 0 and compare the results

Acompressor compresses a gas, a pump compresses a liquid. for a given pressure ratio, why does it take more work to compress a gas in a compressor than a liquid in a pump? a)- for a given pressure ratio the average specific volume for a gas is much higher than the average specific volume for a liquid. b)- there is no difference. the only difference is the amount of heat generated (not work) c)- for a given pressure ratio the average volurge for a gas is much higher than the average volume for a liquid. d)-there is no difference