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The fastest served tennis ball, served by Big Bill Tilden in 1931, was measured at 73.14 m/s . The mass of a tennis ball is 57.0 g, and the ball is typically in contact with the tennis racquet for 30.0 ms , with the ball starting from rest. Make a free-body diagram of the tennis ball during the serve. Make a free-body diagram of the tennis ball just after it has moved free of the racquet.
an electric dipole has charges of +- 4.55pC that are seperate by 6.00cm. The dipole lies on the x axis and its center is at the origin. Determine the torque on the dipole about its center of mass
The lowest energy possible for a certainparticle in a certain box is 1eV. What are the next two higherenergies the particle can have
A typical car weighs about 3500 lb. what is the approximate edge size of the square area with which each tire contacts the ground
A 1.6-m-long string fixed at both ends vibrates at resonant frequencies of 720 Hz and 960 Hz, When the tension in the string is 1162 N, what is the total mass of the string
A solid cylindrical disk is to be used as a stabilizer in a ship. By using a massive disk rotating in the hold of the ship, the captain knows that a large torque is required to tilt its angular momentum vector.
A device uses a Stirling cycle on 433 moles of a monatomic ideal gas between two reservoirs with temperatures of 416 K, How much work is done by the device on the gas
a train has a length of 82 m and starts from rest with a constant acceleration at time t 0 s. at this instant a car
A typical coal-fired plant generates 1000 MegaWatts of usable power at an overall thermal efficiency of 35%, What is the rate of heat input to the plant
A vehicle with a mass of 2200kg moving with an initial speed of 24.6 m/s hits a utility pole and comes to a stop. What acceleration does the car encounter
A star of mass 2.0 1028 kg that is 4.6 x 1020 m from the center of a galaxyrevolves around that center once every 4.6 x 108 years. estimate the number of stars in the galaxy
Two college students having the same mass M roll toward each other on roller blades, each moving at the same speed v. What is the combined momentum of the two skaters?
A position-time graph for an object moving in the - dir'n and accelerating from a low velocity to a high velocity is shown below. If the object is moving in the - dir'n, then the slope of a p-t graph would be -. If the object is changing velocity fro..
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