An inexpensive food and beverage container is fabricated from 25-mm-thick polystyrene (k 0.023 W/m K) and has interior dimensions of 0.8 m 0.6 m 0.6 m. Under conditions for which an inner surface temperature of approximately 2C is maintained by an ice-water mixture and an outer surface temperature of 20C is maintained by the ambient, what is the heat flux through the container wall? Assuming negligible heat gain through the 0.8 m 0.6 m base of the cooler, what is the

A2-m rigid tank initially contains saturated water vapor at 100 kpa. the tank is connected to a supply line through a valve. steam is flowing in the supply line at 600 kpa and 300 c. the valve is opened, and steam is allowed to enter the tank until the pressure in the tank reaches the line pressure, at which point the valve is closed. a thermometer placed in the tank indicates that the temperature at the final state is 200°c. determine (a) the mass of steam that has entered the tank (b) the amount of heat transfer.