The surface area of a postage stamp is 0.00600 m^2, and the air exerts 1.00 atm of pressure on it. How much force does it exert on the stamp?

Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300° c, and the exhaust water is at 37° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

What are the applications of electromagnetic waves