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The mass of a regulation tennis ball is 58.0 g (although it can vary slightly), and tests have shown that the ball is in contact with the tennis racket for 31.0 ms . (This number can also vary, depending on the racket and swing.) We shall assume a 31.0 ms contact time throughout this problem. The fastest-known served tennis ball was served by "Big Bill" Tilden in 1931, and its speed was measured to be 73.14 m/s. a) What impulse did Big Bill exert on the tennis ball in his record serve? b) What force did Big Bill exert on the tennis ball in his record serve? c) If Big Bill's opponent returned his serve with a speed of 56.0 m/s , what force did he exert on the ball, assuming only horizontal motion? d) If Big Bill's opponent returned his serve with a speed of 56.0 m/s , what impulse did he exert on the ball, assuming only horizontal motion?
An arrow is shot vertically upward and then 2.06 s later passes the top of a tree 41.3 m high. How much longer will the arrow travel upward
The electric field 2.0 cm from a small object points away from the object with a strength of 270,000 nC. What is the objects charge
A steel cable with total length,52 mand mass,130 kgis connected to two poles. Calculate the wavelength of the resulting wave on the cable
A container of hot water at 80 degrees cools to 79 degrees in 15 seconds while it is placed in a room that is t 20 degrees. Use newton's law of cooling to estimate the time it will take for the container to cool from 50 degrees to 49 degrees.
John is sitting ( at rest) at the top of a slide that is inclined 25 deg with respect to the horizontal. how much does the thermal energy increase during John's trip down the slide
A model of a red blood cell portrays the cell as a spherical capacitor, a positively charged liquid sphere of surface area A separated from the surrounding negatively charged fluid by a membrane of thickness t, Estimate the capacitance of the cell ..
blocks are lined up in a row on a frictionless table. How much force does the 8.0 block exert on the 7 block.
Two adjacent natural frequencies of an organ pipe are determined to be 299 Hz and 345 Hz. (Suppose the speed of sound is 343 m/s.)
First, set the mass of the star to 1.0 solar masses and click the "Auto" box. What is the lifetime of a Solar mass star according to this simulation
A 2.0 mm tall object is 20.0 cm to the left of a diverging lens that has a focal length of f= -30.0 cm. how tall is the image?
A reversible engine takes in 555 joules per second and exhausts 482 watts. how much power does it produce
An empty storage tank has a volume of 144 ft3. What is the buoyant force exerted on it by the air
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