Physics, 30.01.2022 20:10 dontap3037
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?
Answers: 2
Physics, 22.06.2019 02:30
If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?
Answers: 1
Physics, 22.06.2019 10:40
Two point charges are on the y axis. a 3.90-µc charge is located at y = 1.25 cm, and a -2.4-µc charge is located at y = −1.80 cm. (a) find the total electric potential at the origin. v (b) find the total electric potential at the point whose coordinates are (1.50 cm, 0). v
Answers: 1
Physics, 22.06.2019 11:00
Consider a system to be two train cars traveling toward each other. what is the total momentum of the system before the train cars collide? kg • what must the total momentum of the system be after the train cars collide? kg •
Answers: 2
Physics, 22.06.2019 14:50
Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.
Answers: 2
3 Physics questions
1. A steam shovel raises 450.0 kg of dirt a vertical distance of 8.6 m. The en...
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