Collisions between particles of a gas and the walls of a container cause the in a closed container of gas.
a. density
b. fluid
c. pressure
d. phase change

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

Aman throws a football straight into the air. as it rises, it slows down. which type of energy is the football gaining?

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.