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1. The mass of a penny is 2.50 g. What is the gravitational potential energy of the penny if it at rest at the top of the Empire State Building which is 381 m high. 2. A sky diver is about to jump out of a plane 2500 m high. She has a mass of 58 kg. What is her gravitational potential energy? (Ignore all kinetic energy) 3. A tired mom is picking up after her child and she bends down to pick up his Yoshi doll. The plush doll has a mass of 0.45 kg. She lifts if from the floor to about her waist 1.0 m high. What is the work done by the mom to pick up the doll? 4. A 8.5 kg suit case is on the top of a shelf that is 2.4 m high. What is the work required by a guy to place it on the bed 0.90 m high? 5. A mechanic has a car on a lift. The 2050kg car goes up from the ground to a point 2.45 m high. What is the work done by gravity to lift the car? 6. A kid is on a sled sliding down a hill. The hill is 8.0 m high and slopes slowly downwards. The kid and sled together have a mass of 51 kg. How much work does gravity do in bringing the kid down?
A sphere of radius R is uniformly charged to a total charge of Q. It is made to spin about an axis that passes through its center with an angular speed ω. Find the magnitude of the resulting magnetic field at the center of the sphere.
A resistor is in the shape of a cube, with each side of resistance R . Find the equivalent resistance between any two of its adjacent corners.
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Questions on blackbody, Infra-Red Detectors & Optic Lens and Digital Image.
Illustrate the cause of the components accelerating from rest down the conveyor.
Calculate the dc voltage applied to the circuit.
Quadrupole moments in the shell model
Determine the tension in each string
Calculate the smallest coefficient of static friction necessary for mass A to remain stationary.
Evaluate maximum altitude?
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