An electric iron of resistance 20 Ω takes a current of 5 A. What is the voltage across the iron? *

Calculate the mass of an object that has a momentum of 100kg x m/sec and velocity of 4 m/sec

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.

If forces acting on an object are unbalanced. true or false