A system consisting of two bodies and three Spring so may be set into free vibrations .
Find the nature frequencies of this system
and the amplitude ratio of the movements
of mass1 and mass2 for each frequeney, mass1= 600kg,
mass2 = 100kg, k1 = 120KN/m, K2 = 90 kN/m, K3 =60 kN/m.​

Agas mixture consists of 8 kmol of h2 and 2 kmol of n2. determine the mass of each gas and the apparent gas constant of the mixture.

Heat transfer by is the fastest mode of heat transfer that requires no intervening medium. a)-conduction b)-convection c)-radiation d)-conduction and convection

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