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Physics, 21.06.2019 17:20
If the force on an object is in the negative direction, the work it does on the object must be [2 points a) negative. b) positive c) the work could be either positive or negative, depending on the direction the object moves
Answers: 1
Physics, 21.06.2019 21:30
Ahydroelectric plant takes energy from water and turns it into electrical energy. what are the transformations of energy in the water molecules that are used in the process of generating electricity this way?
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Physics, 22.06.2019 09:00
When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.
Answers: 1
Physics, 22.06.2019 19:30
A47.2 g block of copper whose temperature is 480 k is placed in an insulating box with a 91.8 g block of lead whose temperature is 200 k. (a) what is the equilibrium temperature of the two-block system? (b) what is the change in the internal energy of the two-block system between the initial state and the equilibrium state? (c) what is the change in the entropy of the two-block system? the heat capacities of copper and lead are 386 j/kg·k and 128 j/kg·k, respectively.
Answers: 1
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Mathematics, 07.06.2020 06:57
Mathematics, 07.06.2020 06:57
Mathematics, 07.06.2020 06:57
Mathematics, 07.06.2020 06:57
Mathematics, 07.06.2020 06:57
Mathematics, 07.06.2020 06:57
Mathematics, 07.06.2020 06:57
Mathematics, 07.06.2020 06:57
Mathematics, 07.06.2020 06:57