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Assume a planet is a uniform sphere of radius R that (somehow) has a narrow radial tunnel through its center. Also assume we can position an apple anywhere along the tunnel or outside the sphere. Let FR be the magnitude of the gravitational force on the apple when it is located at the planets surface. How far from the surface is there a point where the magnitude of the gravitational force on the apple is FR/2 if we move the apple (a) away from the planet and (b) into the tunnel? Express you answer in terms of the variables given.
What mass (in grams) of steam at 100°C should be mixed with 212 g of ice at its melting point, in a thermally insulated container, to produce liquid water at 14.0°C? The specific heat of water is 4186 J/kg·K. The latent heat of fusion is 333 kJ/kg..
A 250g , 49.0 cm diameter turntable rotates on frictionless bearings at 60.0 rpm. What is the turntable's rotation angular velocity when the block reaches the outer edge
q1. an electron and a neutral carbon atom are firstly 2.2 times 10-6 m apart and there are no other particles in the
A basketball player grabbing a rebound jumps 70 cm vertically. How much total time (ascent and descent) does the player spend (a) in the top 11.9 cm of this jump and (b) in the bottom 11.9 cm.
The cylinder of a bicycle pump has an interior diameter of 2.0 cm and a length of 40 cm. How far down (in cm) must you push the piston before air begins flowing into the tire
The heating element of a clothes dryer has a resistance of 11 ? and is connected across a 240-V electrical outlet. What is the current in the heating element
A paddle wheel frictionally adds thermal energy to an ideal monatomic gas in a sealed, insulated container. The paddle wheel is driven by a cord connected to a falling object as shown in the drawing. In this experiment, a 5.0-kg object falls throu..
If the ball is released from rest at a height of 0.91 above the bottom of the track on the no-slip side, what is its angular speed when it is on the frictionless side of the track? suppose the ball is a solid sphere of radius 3.7 and mass 0.14.
A man seeking to set a world record wants to tow a 108000-kg airplane along a runway by pulling horizontally on a cable attached to the airplane. obtain the greatest acceleration the man can give the airplane
The supersonic aircraft Concorde has a length of 61.6m when sitting on the ground on a typical day when the temperature is 12.0C . The Concorde is primarily made of aluminum
q1. two plane mirrors are separated by 140deg as drawing illustrates. if a ray strikes mirror m1 at the 75deg angle of
In April 2010, the worst oil spill until that time occurred when an explosion and fire on the Deepwater Horizon left 11 workers dead and began releasing oil into the Gulf of Mexico.
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