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In being served, a tennis ball is accelerated from rest to a speed of 48.0 m/s. The average power generated during the serve is 2920 Watt. Assuming that the acceleration of the ball is constant during the serve, obtain the force acting on the ball.
F = N
A Cepheid variable in a nearby galaxy looks 106 times fainter than an identical Cepheid in the Milky Way. How far away is the nearby galaxy
A 425 kg bear grasping a vertical tree slides down at constant velocity. What is friction force that acts on the bear.
An intially uncharged 4.59-uF capacitor and a 6.63-kOHm resistor are connected in series to a 1.50-V battery that has negligible internal resistance. Calculate the circuit's time constant in milliseconds
Given a typical wave function describing the state of a particle, how would you determine weather the function is properly normalized while being precise and specific and by providing math expressions?
The electric motor of a heat pump transfers energy as heat from the outdoors, which is at -7.4°C, to a room, which is at 15°C. If the heat pump were a Carnot heat pump (a Carnot engine working in reverse), how much energy would be transferred as heat..
Suppose that the hail comes straight down at a mass rate of m/?t = 0.030 kg/s and an initial velocity of v0 = -10 m/s, calculated the force exerted by the hail on the roof
Both drawings show the same square, each of which has a side oflength L = 0.88 m. An observer O is stationed at onecorner of each square. Two loudspeakers are located at corners ofthe square, as in either drawing 1 or drawing 2.
a chair of weight 3.0 n lies atop a horizontal floor the floor is not frictionless. you push on the chair with a force
A continuous stream of electrons flows along a long straight paththrough a piece of laboratory equipment: 5.750e+18 ofthem pass through the equipment each second. What is the strengthof the magnetic field created by this stream at a distance of0.250 ..
a coin and a ring each with the same mass roll down an incline starting at the same time. which one will reach the
question what is the maximum possible coefficient of performance of a heat pump that brings energy from outdoors at
A lead bullet (? = 11.3 X 103 kg/m3) is placed in a pool of mercury (? = 13.6 X 103 kg/m3). What fractional part of the volume of the bullet is submerged
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