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An Astronomer is in a spaceship that is orbiting around a planet with a period of 34 hours. The spaceship is a distance of 3 x 107 m away from the planet's center. What is the mass of the planet? How far from the planet would a moon have to orbit to have the same period (28 days) as our moon?
A 68.0 kg person escapes from a burning building by jumping from a window 25m above a catching net. Assuming that air resistance exerts a 95N force on the person during the fall, determine the person's velocity just before hitting the net.
A car accelerates uniformly from rest to a speed of 35.0 mi/h in 9.0 s, find the constant acceleration of the car
A rubber ball of mass 39.0 g is dropped from a height of 1.80 m onto a floor. find impulse was applied to the ball during the collision
A piece of wood is 0.600m long, 0.210m wide, and 0.08 m thick. Its density is 600kg/m3. find the mass of this volume of lead
A 6.0-kg block is at rest on a horizontal floor. If you push horizontally on the 6.0-kg block with a force of 24.0 N, it just starts to move. What is the coefficient of static friction
A 100-kg halfback running north with a speed of 12 m/s is tackled by a 110-kg opponent running south with a speed of 4.0 m/s. If collision is completely inelastic and head-on, compute the speed of the players just after the tackle.
A rescue helicopter lifts a 90-kg person straight up by means of a cable, What is the tension in the cable and How much work is done by the tension in the cable
during a racing event a 110 kg car accelerates from 0 to 29 m/s in 4.3 seconds. what is the net force exerted on the car
A 150 g aluminum cup contains 150 g of water and both are at 13 C. If you add 150 g of hot water at 90 C what is the final temperature at thermal equilibrium? How much hot water at 90 C needs to be added to achieve a final temperature of 44 C?
A lead bullet with a mass of 0.02 kg traveling at 209 m/s strikes an armor plate and comes to a stop. what is the temperature change
You are designing a lathe motor, part of which consists of a uniform cylinder whose mass is 90 kg, At what rate is the angular momentum increasing
A nuclear power plant has an electrical power output of 2000 MW and operates with an efficiency of 34%. what is the rise in temperature of the flowing water
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