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two forces whose resultant is 80N are perpendicular to each other,if one of them makes an angle 60degree with resultant.calculate its magnitude.
A farsighted woman breaks her current eyeglasses and is using an old pair whose refractive power is 1.750 diopters. How far is her near point from her eyes
q1. a water-skier is moving at a speed of 14.7 ms. while she skis in the same direction as a travelling wave she
A cylindrical space station of radius R and length L has a density that varies with distance from its center, Calculate the total mass M of the entire space station
A rock is thrown vertically upward with a speed of12.0 m/s from the roof of a building that is 50.0 m above the ground. Suppose free fall. Find the speed of the rock just before it strikes the ground
A particle with a mass of 2.5×105kg and a charge of +2.0 µC is released in a (parallel plate) uniform horizontal electric field of 15N/C, What is the horizontal component of its velocity at that point
A uniformly charged conducting sphere of 1.4 m diameter has a surface charge density of 11 µC/m2. Find the net charge on the sphere
The charge +q travels a distance d from point A to point B in a uniform electric field of magnitude E, what is the work done by the field on the charge
A device for training astronauts and jet fighter pilots is designed to rotate a trainee in a horizontal circle of radius 12.0. how fast is she rotating
What happens in the table as to the potential energies
a zero-resistance rod sliding to the right on two zero-resistance rails is separated by the distance L = 0.51 m. The rails are connected by a 11.7-? resistor, What is the rate of energy dissipation in the resistor
A 75.0 kg stunt man jumps from a balcony and falls 26.5 m before colliding with a pile of mattresses. what is the average force exerted by the mattresses on the stuntman
two 1.7 kg masses are 2.0 m apart center to center on a frictionless table. each has 1.0 microc of charge. a what is
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