Students in a physics lab are to determine the specific heat of copper. They heat 0.890kg of copper shot to 110º C and then carefully pour the hot shot into calorimeter cup containing 0.400kg of water at 20ºC. The final temperature of the mixture in the cup is measured to be 35ºC. If the aluminum cup has a mass of 0.067kg, what is the specific heat of copper?

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is transformed ⇒ as it changes into other forms of energy.

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 average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest