Physics, 05.07.2020 14:01 gorbyalexis
The Kelvin temperature of the hot reservoir of a Carnot engine is twice that of the cold reservoir, and work done by the engine per cycle is 18 J. (a) Calculate the efficiency of the engine.
Answers: 3
Physics, 21.06.2019 13:50
Ahot-air balloon is drifting straight downward with a constant speed of 2.40 m/s. when the balloon is 7.63 m above the ground, the balloonist decides to drop one of the ballast sandbags to the ground below. how much time elapses before the sandbag hits the ground?
Answers: 1
Physics, 21.06.2019 23:20
According to newton's second law, when the same force is applied to two objects of different masses, a the object with greater mass will experience a great acceleration, and the object with less mass will experience an even greater acceleration, b. the object with greater mass will experience a smaller acceleration, and the object with less mass will experience a greater acceleration, c. the object with greater mass will experience a greater acceleration, and the object with less mass will experience a smaller acceleration, d. the object with greater mass will experience a small acceleration, and the object with less mass will experience an even smaller acceleration.
Answers: 1
Physics, 22.06.2019 00:30
There are weak or strong attractive forces between atoms of liquids with a high viscosity
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Physics, 22.06.2019 03:30
What is the momentum of a 2 kg object moving at 15 meters per second
Answers: 1
The Kelvin temperature of the hot reservoir of a Carnot engine is twice that of the cold reservoir,...
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