A cylindrical tank measuring 0.75 m in diameter and 1.2 m high contains a transformer immersed in an oil bath that produces a uniform surface temperature condition. All heat loss may be assumed due to natural convection to surrounding air at 295 K from the top and side walls. The heat dissipation rate from the transformer is constant at 1.5kW. Required:
Write down the total heat transfer rate equation as a function of surface temperature and relevant characteristic dimensionless numbers.

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

Acompressor receives the shaft work to decrease the pressure of the fluid. a)- true b)- false

Fluids at rest possess no flow energy. a)- true b)- false