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Question1
The mean distance from the center of earth to the center of the moon is rem = 3.84 × 108 m. The mass of the earth is me = 5.98 × 1024 kg and the mass of the moon is mm = 7.34 × 1022 kg. The mean radius of the earth is re = 6.37 × 106 m. The mean radius of the moon is rm = 1.74 × 106 m. How far from center of earth is the center of mass of the earth-moon system situated?
Question2
A satellite is originally in circular orbit at radius R about a planet of mass M. We wish to transfer it to a new circular orbit at radius 2R, using an in-between transfer orbit which is an ellipse with perigee R and apogee 2R. We make a brief rocket burn in longitudinal direction to switch from circle to ellipse at r = R, and another burn at r = 2R to exit the ellipse and start the larger circle. What are the two velocity changes required? What is eccentricity of the transfer ellipse? How long does transfer take?
A ray of light traveling through air encounters a 1.7cm -thick sheet of glass at a 42? angle of incidence. Assume n = 1.5. How far does the light ray travel inside the glass
At t = 0, a wheel rotating about a fixed axis at a constant angular acceleration of -0.40 rad/s^2 has an angular velocity of 1.5 rad/s, What is the angular position of the wheel at t = 2.0 s
A current of 18 Ampere runs through the Parallel Wire Apparatus. What is the anticipated mass (in milligrams) for balancing the frame-balance
A golfer hits a shot to a green that is elevated 2.60 m above the point where the ball is struck. find the speed of the ball just before it lands
An airplane is flying horizontally with a speed of 1000 km/h(280m/s) when an engine falls off. avoid air resistance,assume it takes 30s for the engine to hit the ground.
Two soccer players start from rest, 30 m apart. They run directly toward each other, both players accelerating. How much time passes before the players collide
How fast can this car round a second curve of radius 320m?
Tarzan swings through the jungle by hanging from a vine. Immediately after he steps off the branch, is Tarzan's acceleration zero or nonzero
During spin-dry cycle of a washing machine, the motor slows from 90 rad/s to 30 rad/s while the turning the drum through an angle of 180 radians. What is the magnitude of the angular acceleration of the motor.
Calculate the speed of a proton after it accelerates from rest through a potential difference of 160.
The coefficient of friction between a certain brass block and a large revolving turntable is μ = 0.24. What is the period of rotation of the turntable
A particle with a charge of -1.5uC and a mass of 2.5x10-6 kg is released from rest at point A and accelerates toward point B, arriving there with a speed of 42 m/s. The only force acting on the particle is the electric force. (a) Which point is at..
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