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A 21.00 kg block is pushed up a frictionless inclined plane that makes an angle of θ = 39o with the horizontal direction. What force is required to move the block with constant speed? Suppose that the force is parallel to the surface of the plane.
what is the law of reflection?what is the law of refraction? what other name is sometimes given to it?what is meant by
a 2.0-kg block slides on a frictionless 15 degree inclined plane. a force acting parallel to the incline is applied to
To estimate the size of the moon, a person holds a round pencil of diameter 0.70 cm. When the pencil is 77 cm in front of his eye, What is the angle subtended by the moon
It takes the elevator in a skyscraper 4.5s to reach its cruising speed of 12m/s. What is the passenger's weight before the elevator starts moving
A uniform rod of length 0.790 m and mass 14.50 kg is balanced on a sharp edge at 0.650 m from the left end. At the left end hangs a mass of 45-kg and the right end hangs an unknown mass so that the whole assembly is in equilibrium.
tarzan is curled in a ball and is swinging on rope trying to get to next tree. he is unable to make it to next tree and
presume you had job offers from two companies that differed only in how often they produced CEOs. Would these differences affect your decision.
A cell phone transmits at a frequency of 1.28 108 Hz. What is the wavelength of the electromagnetic wave used by this phone
Two balls are simultaneously dropped from a height of 5.0 Part A: How long does it take for the balls to reach the ground? Use 10 for the magnitude of the acceleration due to gravity. Part B: Imagine the ball on the left is given a nonzero initial..
the primary coil of an ideal transformer has 700 turns and the secondary coil has 190 turns.a if the primary coil
An airplane flies horizontally with speed 1000km/h(280m/s) an engine falls it takes 30s to gets to the ground. neglect air resistance elucidate the airplane is 4.5km high?.
Train car 1 has a mass of 6.5 x 10^4 kg and is sitting stationary on a track. Train car 2, with a mass of 9.30 x 10^3 kg, What is the speed of Train car 1 after the collision
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