Physics, 21.11.2019 02:31 tinytoonjr9510
After coming down a slope, a 60-kg skier is coasting northward on a level, snowy surface at a constant 15 m> s. her 5.0-kg cat, initially running southward at 3.8 m> s, leaps into her arms, and she catches it. (a) determine the amount of kinetic energy converted to internal energy in the earth reference frame. (b) what is the velocity, measured in the earth reference frame, of an inertial reference frame in which the cat’s kinetic energy does not change?
Answers: 2
Physics, 21.06.2019 21:30
Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?
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Physics, 22.06.2019 08:40
Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?
Answers: 1
Physics, 22.06.2019 11:00
Alarge box of mass m is pulled across a horizontal frictionless surface by a horizontal rope with tension t. a small box of mass m sits on top of the large box. the coefficients of static and
Answers: 1
Physics, 22.06.2019 14:00
Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?
Answers: 1
After coming down a slope, a 60-kg skier is coasting northward on a level, snowy surface at a consta...
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