3 Physics questions 1. A steam shovel raises 450.0 kg of dirt a vertical distance of 8.6 m. The engine provides 200KJ of energy as heat for the steam shovel to lift the dirt. How much work, in Joules, is done by the steam shovel? Use g as 9.81m/s2.WRITE YOUR ANSWER IN SCIENTIFIC NOTATION

2. A coal-burning power plant has an efficiency of 35 percent. If the power plant uses 737M J of energy as heat, how much work is done by the power plant?

3. A certain diesel engine performs 372 J of work in each cycle with an efficiency of 33.0 percent. How much energy is transferred from the engine to the exhaust and cooling system as heat?