A central air conditioner in a typical American home operates on a 220-V circuit and draws about 15 A of current
a. Determine the power rating of such an air conditioner.
b. Determine the energy consumed (in kW. hr) if operated for 8 hours per day.
c. Determine the monthly cost (31 days) if the utility company charges 13 cents per kW. hr.

Modify the equation fδt=δ (mv) to find the force of friction.

Apackage of supplies is dropped from a plane, and one second later a second package is dropped. neglecting air resistance, the relative velocity of the 1st package viewed from the second will 56) a) increase. b) be constant. c) be zero. d) depend upon their weight. e) decrease

8.29 two streams containing pyridine and acetic acid at 25°c are mixed and fed into a heat exchanger. due to the heat-of-mixing effect, it is desired to reduce the temperature after mixing to 25°c using a stream of chilled ethylene glycol as indicated in the diagram. calculate the mass flow rate of ethylene glycol needed. the heat capacity of ethylene glycol at these conditions is approximately 2.8 kj/(kg k), and the enthalpy change of mixing (δmixh) is given below.