Which type of nuclear decay emits two protons and two neutrons?
a. alpha decay
b. beta decay
c. cosmic decay
d. gamma decay

In physics the desire of an object to keep doing what it is doing is termed?

With i really need the correct answer!

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.