Oranges with a diameter of about 3 inches are to be cooled from room temperature of 25°C to a surface temperature of 3°C using an air-convection environment with h = 45 W/m2-K and T[infinity] = -5°C. Assuming that the oranges have the properties of water at 10°C, calculate the time required for the cooling. What is the center temperature at that instant?

Acompressor compresses a gas, a pump compresses a liquid. for a given pressure ratio, why does it take more work to compress a gas in a compressor than a liquid in a pump? a)- for a given pressure ratio the average specific volume for a gas is much higher than the average specific volume for a liquid. b)- there is no difference. the only difference is the amount of heat generated (not work) c)- for a given pressure ratio the average volurge for a gas is much higher than the average volume for a liquid. d)-there is no difference