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A body slides down a plane inclined at 40 degrees to the horizontal, with an acceleration of 2.3 meters/second^2. Determine the coefficient of kinetic friction.
A 50-kg parachutist falls from a height of 2000 m to the ground. Her final speed is 4 m/s. what is the total work done on her
At an outdoor market, a bunch of bananas attached to the bottom of a vertical spring of force constant 16.0 N/m, What is the weight of the bananas in newtons
A sphere completely submerged in water is tethered to the bottom by a string. The tension in the string is 1/5 (aka one-fith) the weight of the sphere. What is the density of the sphere
A man wolks up a flight of stair, his power output is P. he runs up the same stairs with twice the speed. What's new power output
Two identical guitar strings are prepared such that they have the same length (2.17 m) and are under the same amount of tension. find the wave propagation speed on the guitar strings
A hoop and a disk, both of 0.72- m radius and 4.0- kg mass, are released from the top of an inclined plane 2.5 m high and 8.9 m long. What is the speed of the hoop
A brick of mass M sits on a rubber pillow of mass m . Together they are sliding to the right at constant velocity on an ice-covered parking lot, Draw a free-body diagram of the brick and identify each force acting on it
An electron microscope is designed to resolve objects as small as 0.32 nm. What energy electrons must be used in this instrument
A positive charge +q1 is located to the left of a negative charge -q2. On a line passing though the two charges, What is the distance between the charges
q1. a krypton laser produces the cylindrical red laser beam 2.0mm in diameter with 2.0w of power. what is the light
A transformer has the voltages 121 Vpri and 45 Vsec. What is the current flowing in the secondary
A ball is dropped from a height of 1.50 m and rebounds to a height of 1.20 m. Approximately how many rebounds will the ball make
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