Physics, 03.01.2022 04:30 suzyleonardsl0
A lightbulb uses 470 J of energy and produces 180 J of heat and 290 J of light. Calculate the efficiency of the lightbulb.
Answers: 1
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Suppose you use a machine that gives you a mechanical advantage of 2 to achieve an output force of 30newtons what must the input force be
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Abicycle slows down when the rider applies the brakes. what type of energy transformation is involved in this example? a. kinetic energy into heat energy b. heat energy into potential energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy
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Physics, 23.06.2019 01:00
During the apollo moon missions, astronauts were concerned about the effects of newton's third law of motion when: o a. they ejected waste water, because they were concerned that it would push them off course. o b. they reentered earth's atmosphere, because they were carrying heavy moon rocks. o c. they took off from earth, because a large force was required to generate large acceleration. o d. they detected incoming space debris, because the inertia of the debris could damage their ship.
Answers: 3
A lightbulb uses 470 J of energy and produces 180 J of heat and 290 J of
light. Calculate the effi...
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