A 03-series 30-mm cylindrical roller bearing, which was subjected to 300000 revolutions with a radial load of 5 kips is given. Estimate the remaining life of the bearing if it is subsequently subjected to 8 kips

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

Aheat pump with refrigerant-134a as the working fluid is used to keep a space at 25°c by absorbing heat from geothermal water that enters the evaporator at 500c at a rate of 0.065 kg/s and leaves at 40°c. the refrigerant enters the evaporator at 20°c with a quality of 23 percent and leaves at the inlet pressure as saturated vapor. the refrigerant loses 300 w of heat to the surroundings as it flows through the compressor and the refrigerant leaves the compressor at 1.4 mpa at the same entropy as the inlet. determine: (a) the degrees of subcooling of the refrigerant in the condenser, b)-the mass flow rate of the refrigerant . (c) the heating load and the cop of the pump, and d)-the theoretical minimum power input to the compressor for the same heating load.

Derive the 2-d finite difference equation for a uniform grid for a node: a) at a plane surface with a uniform heat flux b) at an internal corner with convection