In order to cool 1 ton of water at 20°c in an insulated tank, a person pours 140 kg of ice at –5°c into the water. the specific heat of water at room temperature is c = 4.18 kj/kg· °c, and the specific heat of ice at about 0°c is c = 2.11 kj/kg°c. the melting temperature and the heat of fusion of ice at 1 atm are 0°c and 333.7 kj/kg.

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

Which is not an example of how an object gains elastic potential energy by stretching? a. jumping on a pogo stick b. pulling on a rubber band c. jumping on a trampoline

Ahair dryer is basically a duct in which a few layers of electric resistors are placed. a small fan pulls the air in and forces it through the resistors where it is heated. air enters a 1200 w hair dryer at 100 kpa and 22°c and leaves at 47°c. the cross-sectional area of the hair dryer at the exit is 60 cm2. neglecting the power consumed by the fan and the heat losses through the walls of the hair dryer, determine (a) the volume flow rate of air at the inlet and (b) the velocity of the air at the exit.