(a) Please show that the heat capacity at constant volume and constant pressure for air are given by, Cv=macvmwherecvm= (1 + 0.92rv)cvdandCp=macpmwherecpm= (1 + 0.84rv)cpdIn the above equations, the mass of air isma=md+mv, wheremdandmvare the masses of dry air andvapor, respectively. The specific heats at constant volume and pressure for moist air (the combination ofdry air and vapor) arecvmandcpm, respectively. (b) The vapor pressure varies greatly in the atmosphere. At a temperature of 0oC, the vapor pressure can reach 611 Pa, while at 30oC, it can reach 4350 Pa. Howmuch do the specific heats at constant volume and pressure for moist air, cvmandcpm, vary at Earth’ssurface? Assume a surface pressure of 100,000 Pa.

What is the main objective of using reheat rankine cycle?

The maximum shear stress and maximum flexural stress occur at the same location along a beam subjected to a non-uniform bending load. a)-trune b)- false

Tom is having a problem with his washing machine. he notices that the machine vibrates violently at a frequency of 1500 rpm due to an unknown rotating unbalance. the machine is mounted on 4 springs each having a stiffness of 10 kn/m. tom wishes to add an undamped vibration absorber attached by a spring under the machine the machine working frequency ranges between 800 rpm to 2000 rpm and its total mass while loaded is assumed to be 80 kg a) what should be the mass of the absorber added to the machine so that the natural frequency falls outside the working range? b) after a first trial of an absorber using a mass of 35 kg, the amplitude of the oscillation was found to be 10 cm. what is the value of the rotating unbalance? c) using me-3.5 kg.m, find the optimal absorber (by minimizing its mass). what would be the amplitude of the oscillation of the absorber?