How much heat is needed to vaporize 25.0 kg of water (Ly = 540 kcal/kg)? A) 4.63 kcal
B)3.15 kcal
C)21,600 kcal
D)13,500 kcal

If you were to drop a rock from a tall building, assuming that it had not yet hit the ground, and neglecting air resistance. what is its vertical displacement (in m) after 6 s?

The volume of a gas is halved during an adiabatic compression that increases the pressure by a factor of 2.5. what is the specific heat ratio? show the math steps .

Clothes dryer uses about 7 amps of current from a 240 volt line. how much power does it use?