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A 1300 kg wrecking ball hangs from a 14 m -long cable. The ball is pulled back until the cable makes an angle of 26.0o with the vertical. By how much has the gravitational potential energy of the ball changed?
q1. a beam of light strikes a sheet of glass at an angle of 57.0circ with the normal in air. you observe that red light
A newly discovered faint asteroid and Mars are observed at opposition. Mars is observed to be 100 million times brighter than the asteroid. Assume Mars and the asteroid are 1.5 and 3.0 AU from the Sun respectively. Estimate the radius of the aster..
A small object with a mass of 380mg carries a charge of 20.0 nC and issuspended by a thread between the vertical plates of aparallel-plate capacitor. what is the potential difference between the plates
A Locomotive of mass 80 tonne, hauls 11 coaches each has a mass of 20 tonne up an incline of 1 in 80. The frictional resistance to motion is 50 N/tonne. determine The change in potential energy of the train
An object of mass "m" is thrown up an inclined plane of angle "theta" with an initial velocity "v knot". If the motion is resisted by retarding force Fr=-kv (where k is a force coefficient and v the velocity of the object.)
A -6.00 µC charge is moving with a speed of 8.20 104 m/s parallel to a very long, straight wire, Find the magnitude and direction of the force on the charge.
The sport of gymnastics requires both impressive physical strength and extensive training for balance. The iron cross is an exercise performed on two suspended rings, which the gymnast grips with his hands
A 72.5 kilogram astronaut pushes to the left on a spacecraft with a force in "gravity-free" space. Obtain the magnitude of the acceleration of the spacecraft
A point charge +2.40 is held stationary at the origin. A second point charge -4.30 moves from the point = 0.175 , = 0 , How Much work is done by the electric force on q2
Babies recovering from surgery need to be fed milk from an open syringe through a nasogastric tube, a slender tube that passes in one nostril and down into their stomach
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 15.0 cm, giving it a charge of -16.6 µC. Find the magnitude of the electric field just inside the paint layer
the two most prominent wavelengths in the light emitted by a hydrogen discharge lamp are 656 nm red and 486 nm blue.
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