An article on noise pollution states that noise intensity levels in large cities grow at the rate of 1 dB per year
a) To what percentage of increase in intensity does this decibel rise rate correspond?
b) In how many years will there be noise intensity duplication if the rate of 1dB per year is maintained?
Answers: 3
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1400 kg car has a speed of 27 m/s. if it takes 7 s to stop the car, what is the impulse and the average force acting on the car?
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Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?
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Mechanical energy is when the amount of kinetic and potential energies added together remains the same. conserved created lost
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Two masses are connected by a rope that hangs over a pulley as shown below. the pulley is a uniform cylinder of radius ν
=0.381meters and mass ν=3.1νν. initially ν"is on the ground and ν#rests 2.5 meters above the ground. if the system is released, use conservation of energy to determine the speed of ν#just before it strikes the ground. assume the pulley bearing is frictionless.
Answers: 2
An article on noise pollution states that noise intensity levels in large cities grow at the rate of...
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