Physics, 18.10.2019 20:00 iselloutt4fun
Why is. a paper clip attracted to a magnet, while a pencil is not?
Answers: 3
Physics, 20.06.2019 18:02
Plzz 10 points ! is some thermal energy always released during a transformation ? and is potential chemical energy always transformed into kinetic energy
Answers: 2
Physics, 21.06.2019 23:00
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?
Answers: 1
Physics, 22.06.2019 14:30
Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?
Answers: 2
Physics, 22.06.2019 17:30
Atruck driver is attempting to deliver some furniture. first, he travels 8 km east, and then he turns around and travels 3 km west. finally, he turns again and travels 13 km to his destination. what is the drivers distance
Answers: 3
Why is. a paper clip attracted to a magnet, while a pencil is not?...
Advanced Placement (AP), 04.04.2020 10:33
Physics, 04.04.2020 10:33
Mathematics, 04.04.2020 10:33
Spanish, 04.04.2020 10:33
Mathematics, 04.04.2020 10:33
Mathematics, 04.04.2020 10:33
Mathematics, 04.04.2020 10:33
Mathematics, 04.04.2020 10:34