Even under the most ideal conditions, only about 8% of the internal energy of the steam produced in a steam engine can be converted into actual work. what happens to the other 92% of the steam's available energy?

The magnitude of the amount of energy released by burning a fuel source, measured in energy per unit mass, is called its fuel value. note that the fuel value is the negative of the isobaric specific heat of combustion for the fuel. if all the energy obtained from burning 1.23 pounds of butane with a fuel value of 10.85 kcal/g is used to heat 128.0 kg of water at an initial temperature of 18.3 °c, what is the final temperature? note that 1 lb = 453.6 g.

An object dropped from cliff falls with a constant acceleration of 10 metre per second square find its speed of two seconds after it was dropped

The built in flash in a compact camera is usally capable of giving correct exsposure for distance up to how many meters?