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A bowling ball, which can be treated as a solid sphere with a diameter of 21.6 cm and a weight of 33 kg, rolls down a bowling lane at a speed of 21 km/h. The kinetic energy of the bowling ball is.
A ray of sunlight hits a frozen lake at a 43.9° angle of incidence. At what angle of refraction does the ray penetrate the ice
A fan is spinning at 900 rpm. When its motor is turned off it makes 75 rev before coming to a stop. Find the moment of Inertia of the fan
A gremlin is a tiny mythical creature often blamed for mechanical failures. Suppose for a moment that a shrewd physicist catches one such gremlin and makes it work for her instead of against her.
Suppose a lake has a layer of ice 11 cm thick on its surface. The top of the ice layer is cooled by the atmosphere to -5.25° C. At what rate is heat transferred through a 1.5 cm2 area of the ice
Two ice skaters, Daniel (mass 65.0 kg) and Rebecca (mass 45.0kg), are practicing. Daniel stops to tie his shoelace and,while at rest, find direction of Daniel's velocity after the collision
A 218.7 kg satellite is in a circular orbit of 26,273 miles (42,300,000 m) in radius. What is the velocity (speed) of the satellite
q1. a proton orbits a long charged wire making 1.50 times 10 6 revolutions per second. the radius of the orbit is 1.60
What is the initial (horizontal) velocity of the ball.
A passenger in a roller coaster ride experienced weightless when s/he was at the top of the loop. If the loop has radius 16.0 m, what is the linear speed at the top
A projectile is shot on level ground with a horizontal velocity of 18 m/s and a vertical velocity of 41 m/s, Find the time the projectile is in the air. The acceleration due to gravity is 9.8 m/s2
The head of a hammer with a mass of 1.5kg is allowed to fall onto a nail from a height of 0.70m, What is the maximum amount of work it could do on the nail
As you eat your way through a bag of chocolate chip cookies, you observe that each cookie is a circular disk with a diameter of 8.50 ± 0.02 \rm cm, Find the ratio of the diameter to the thickness
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