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An object is dropped from rest from a height of 3.74E+6 m above the surface of the earth. If there is no air resistance, what is its speed when it strikes the earth?
A small motor is mounted on the axis of a space probe with its rotor (the rotating part of the motor) parallel to the axis of the probe. Through how many revolutions has the rotor turned
An Earth satellite moves in a circular orbit 644 km above Earth's surface with a period of 97.40 min, What are the magnitude of the centripetal acceleration of the satellite
A compressed-air cylinder is known to fail if the pressue exceeds 100 atm. What is the pressure inside the cylinder during the fire
A stream moving with a speed of 0.8 m/s reaches a point where the cross-sectional area of the stream decreases to one-half of the original area
question1a 60.0-kg projectile is fired at the angle of 30.0deg above the horizontal with an initial speed of 1.28 102
A roller-coaster car moves 207 ft horizontally and then rises 119 ft at an angle of 30° above the horizontal. What is its displacement from its starting point
The wavelength of visible light varies from 0.40 ?m to 0.70 ?m as the color of the light changes from violet to red. Calculate the energy of a photon whose wavelength is 0.43 ?m
A train is rounding a circular curve whose radius is 2.00 102 m. At one instant, the train has an angular acceleration of 1.50 10-3 rad/s2 and an angular speed of 0.0200 rad/s
q1. two ocean liners each with a mass of 38000 metric tons are moving on parallel courses 92 m apart. what is the
A 2.5 kg object is attached to a horizontal spring of force constant k = 4.1 kN/m. The spring is stretched 10 cm from equilibrium and released. Find the maximum acceleration
A young boy with a broken leg is undergoing traction. What is the magnitude of the force exerted on the femur by the lower leg
An air conditioner connected to a 120 V rms ac line is equivalent to a 12.7 ? resistance and a 1.53 ? inductive reactance in series. estimate the impedance of the air conditioner
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