Which statement is the NOT an example of the law of conservation of energy?
A.
Water falls fr...
Physics, 25.08.2020 18:01 BreBreDoeCCx
Which statement is the NOT an example of the law of conservation of energy?
A.
Water falls fromt the sky, converting potential energy to kinetic energy. This energy is then used to rotate the turbine of a generator to produce electricity.
B.
A car burns fuel to move and some of the energy is lost which makes the engine hot.
C.
Energy is transferred from a bowling ball to the bowling pins to make them fall.
D.
Electrical energy is transformed into mechanical energy to move the hands of a clock.
Answers: 2
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Consider a double atwood machine constructed as follows: a mass 4m is suspended from a string that passes over a massless pulley on frictionless bearings. the other end of this string supports a second similar pulley, over which passes a second string supporting a mass of 3m at one end and m at the other. using two suitable generalized coordinates, set up the lagrangian and use the lagrange equations to find the acceleration of the mass 4m when the system is released. explain why the top pulley rotates even though it carries equal weights on each side.
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We will use a video to study faraday’s law of electromagnetic induction by analyzing the induction that occurs due a coil of copper wire sliding along an air track that passes through an external magnetic field. specifically, we will: examine some of the main principles behind faraday’s law. apply lenz’s law to determine the direction of the induced emf. take measurements of the induced emf from the voltmeter as the coil passes into and out of the external magnetic field. use the horizontal scale provided to determine the speed of the coil. calculate the magnetic field induced in the coil as it passes into and out of the external magnetic field.
Answers: 2
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