Ametal rod, 20 mm diameter, is tested in tension (force applied axially). the total extension over a length of 80 mm is 3.04 x 102 mm for a pull of 25 kn. calculate the normal stress, normal strain and modulus of elasticity (young's modulus), assuming the rod is linear elastic over the load range.

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