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When the play button is pressed, a CD accelerates uniformlyfrom rest to 495 rev/min in 2.6 revolutions. If the CD has a radius of 6 cm, and amass of 17 g, what is the torque exerted on it?
How many photons per second are emitted by a monochromatic lightbulb (640 ) that emits 45 of power If you stand 15 from this bulb, how many photons enter each of your eyes per second? Assume your pupil is 5.0 in diameter and that the bulb radiates un..
A bicyclist traveling with speed v= 4.2 m/s on a flat road ismaking a turn with a radius r =6.4m. If the coefficient of static friction between tiresand road is 0.70, what is the minimum turning radius
calculate the speed of an electron that is accelerated through the same potential difference, and Calculate the speed of a proton
a monatomic ideal gas is thermally insulated so no heat can flow between it and its surroundings. is it possible for
An astronaut in training is placed in a merry-go-round-likedevice that rotates her at high speed in a horizontal circle ofradius 5 m. At what rate does she have to rotate
A particle is acted on by 2 torques about the origin: has a magnitude of 2.0Nm and is directed in the positive direction of the x axis, and has a magnitude of 4.0Nm and is directed in the negative direction of the y axis. In unit-vector notation, fin..
Calculate the centripetal force exerted on the Earth by the Sun. Assume that the period of revolution for the Earth is 365.25 days, the average distance is (1.5 x 10^24)kg
a motor is designed to operate on 132 v and draws a current of 9.4 a when it first starts up. at its normal operating
what is the approximate yield strength of a copper silica alloy which has spherical precipitates of silica of average
A tennis ball is struck at the base line of the court, 13.3 m from the net. The ball is given an initialvelocity with a horizontal component equal to 22.0 m/s at an initial elevation of 1.45 m.
a kid plays with a yo-yo of mass 125 g and twirls it in a vertical circle. the lneght of the string is 90.0 cm. the kid
Under certain conditions, the human body can withstand an acceleration of 10 g%u2019s. What is the net force (in Newtons) acting on a person
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