3. A steam engine does 2500 J of useful work to move a wheel through half a rotation. The energy provided to the steam engine by heat for this work equals 7576 J. Calculate the efficiency of the engine.

You've already seen the value of 9.8 in this lesson. what's this value called? what quantity does it represent?

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)

Slab pull” is a type of tectonic plate movement that occurs due to the forces of mantle convection and results in the subduction of the lithosphere true or false