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Birds resting on high-voltage power lines are a common sight.The copper wire on which a bird stands is 2.1 cm in diameter and carries a current of52 A. If the bird's feet are4.2 cm apart, calculate the potential difference across its body.
A sound wave traveling at 341m/s is emitted by foghorn of a tugboat. An echo is heard 3.30s later.
A box stands against the wall of a cylinder that is rotating. The cylinder has a radius of 30cm. What is the minimum consant speed (magnitude of linear velocity) the box must move so it doesn't slip
The 600-N ball shown is suspended on a string AB and rests againsta frictionless vertical wall. The string makes an angle of 30? with the wall. The ball presses against the wall with a force of magnitude:
An 9.00-cm-diameter, 330g solid sphere is released from rest at the top of a 1.70-m-long, 20.0? incline. What is the sphere's angular velocity at the bottom of the incline
A high fountain of water is located at the center of a circular pool, Not wishing to get his feet wet, a student walks around the pool How high is the fountain
What is the acceleration of two falling sky divers.
A cylindrical 98.50 ? resistor is made from a coil of copper wire whose total mass is 74.0 g, What is the diameter and lenght of the wire
Coherent light with wavelength 590 mm passes through two very narrow slits, and the interference pattern is observed on a screen a distance of 3.00 m from the slits.
Consider a game of billiards. The cue ball has an initial speed v0 before it strikes the eight ball which was previously at rest, Find the nal speeds of both the cue ball and the eight ball, assuming that the collision was perfectly elastic
A box of weight Fg=2N accelerates down a rough plane that isinclined at an angle %u03C6=30 degrees above the horizontal, What is the work Wgrav done on the box by gravity
If the frequency is variable and the length of the closed (at both ends) tube is fixed at 45 cm, sketch the plastic tube showing the position of the nodes and anti-nodes for the three lowest resonant.
A 0.18kg rubber ball is dropped from a height of 1.2m above the floor and it bounces back to a height of 0.70m. What is the speed of the ball just as it leaves the ground
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