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To test the quality of a tennis ball, you drop it onto the floor from a height of 4.26 m. It rebounds to a height of 2.63 m. If the ball is in contact with the floor for 10.6 ms, what is its average acceleration during that contact?
Four charges Aq,Bq,Cq, and Dq (q = 5 x 10-07C) sit in a plane at the corners of a square whose sides have length d = 80.0 cm. A charge, Eq, is placed at the origin at the center of the square.
A violinist is trying to tune her instrument to 512 Hz, but it is at 491. By what percent does she have to change the tension to tune the violin? Answer A) 1.2% B) 4.1% D) 8.7% E) 12.1% F) 14.5%
how to Calculate the acceleration of the system. Assume the magnitude of the acceleration is the same during starting and stopping.
Donovan Bailey set a world record for the 100-m dash on July 27, 1996. If observers on a spaceship moving with a speed of 0.7705 c relative to Earth saw Donovan Bailey's run
A very long, thin straight line of charge has a constant charge density of 20pC/cm. How far does the electron go before it comes back
A golfer tees off from the top of a rise, giving the golf ball an initial velocity of 43 m/s at an angle of 30o above the horizontal. How high is the rise above the fairway
A candle is placed 37.8 cm in front of a convex mirror. When the convex mirror is replaced with a plane mirror, Find the focal length of the convex mirror
A 9.58 m × 14.9 m house is built on a 14.2-cm-thick concrete slab. What is the heat-loss rate through the slab
As a baseball is being caught, its speed goes from 36 to 0 m/s in about 0.009 s. Its mass is 0.145 kg. What is the size of the force acting on it
The magnetic field 45.0 cm away from a long, straight wire carrying current 8.00 A is 2.00 µT. At what distance is it one-tenth as large
A 5.7kg box is on a frictionless 44° slope and is connected via a massless string over a massless, find the tension in the string once the box begins to move
A parallel plate capacitor has a potential difference between the plates of 80 V. what is the electrical energy stored by this capacitor
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