An insulated rigid tank contains 5 kg of a saturated liquid-vapor mixture of water at a. initially, three-quarters of the mass is in the liquid phase. an electric resistor placed in the tank is connected to a 110-v source, and a current of 8 a flows through the resistor when the switch is turned on. (a) determine how much time it will take to vaporize all the water in the tank, and (b) show the process on a t-v diagram with respect to the saturation lines.

The temperature of air decreases as it is compressed by an adiabatic compressor. a)- true b)- false

Apump is used to circulate hot water in a home heating system. water enters the well-insulated pump operating at steady state at a rate of 0.42 gal/min. the inlet pressure and temperature are 14.7 lbf/in.2, and 180°f, respectively; at the exit the pressure is 60 lbf/in.2 the pump requires 1/15 hp of power input. water can be modeled as an incompressible substance with constant density of 60.58 lb/ft3 and constant specific heat of 1 btu/lb or. neglecting kinetic and potential energy effects, determine the temperature change, in °r, as the water flows through the pump.

The short distance from the objective lens to the object causes problems at high magnification. which of the following is the most serious? a. cleaning the object surface b. positioning the object c. reflection from the object surface. d. illumination of the object