Physics, 28.05.2021 18:10 hernsl0263
A heat engine exhausts 3000 J of heat while performing 1500 J of useful work. What is the efficiency of the engine
Answers: 1
Physics, 21.06.2019 20:10
Select the correct answer. anna will wear a black dress when she attends het cousin's wedding. which color(s) does the dress absorb? a. all colors b. no colors c. red and green d. white
Answers: 1
Physics, 22.06.2019 18:30
Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?
Answers: 3
Physics, 22.06.2019 18:30
Ahot-air balloon is 11.0 m above the ground and rising at a speed of 7.00 m/s. a ball is thrown horizontally from the balloon basket at a speed of 9.00 m/s. ignore friction and air resistance and find the speed of the ball when it strikes the ground.
Answers: 1
A heat engine exhausts 3000 J of heat while performing 1500 J of useful work. What is the efficiency...
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