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A 1.6 kilogram softball is pitched to you at 36 m/s. You hit the ball back along the similar path, and at the same speed. If the bat was in contact with the ball for 0.12 s, find the magnitude of the average force the bat exerted?
A horizontal wire of length 0.57 m, carrying a current of 8.0 A, is placed in a uniform external magnetic field. When the wire is horizontal, estimate the magnitude of the external magnetic field
The tension in a string is 15 N and its linear density is0.085 kg/m. What is the speed and wavelength of the wave
An open train car, with a mass of 2010 kg, coasts along a horizontal track at the speed 2.73 m/s. evaluate the car\'s speed after the loading is completed
To a first approximation, the velocity of sound in air for different temperatures can be calculated as v=(331+0.6T) m/s, How far away was the lightning
1 what is the magnitude of the force on a 50 cm 0.500 m long wire carrying 15.0 a at right angles to a 0.005 t 500 g
A 116 g Frisbee is 28 cm in diameter and has about half its mass spread uniformly in a disk, and the other half concentrated in the rim. What is the rotational inertia of the Frisbee
A stone with a mass of 0.700 {\rm kg} is attached to one end of astring 0.700 {\rm m} long. The string will breakif its tension exceeds 65.0 {\rm N}. The stone is whirled in ahorizontal circle on a frictionless tabletop;
a boy throws a ball upward from the top of a tower with a speed of 12ms. on the way down it just misses the thrower and
A 70 kg man (rad=0.25m) standing on a 10-kg disc (rad=0.4m) with his arms extended (rad=0.9m) holding a 15-kg weight in each hand. What is the rotational inertia of man with weights.
A sled weighing 100N is held in place on a frictionless 20 degree slope by a rope which is attached to a stake at the top. What is the normal force of the slope acting on the sled
A vehicle is speeding at 115 km/h on a straight highway when a police car moving at 145 km/h enters the highway from an onramp and starts chasing it.
What is the energy density. Find out the lowest frequency that permits standing waves in both strings with a node at the junction. The standing wave pattern in each string may have a different number of loops.
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