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A roller coaster at an amusement park has a dip that bottoms out in a vertical circle of radius r. A traveler feels the seat of the car pushing upward on her with a force equal to five times her weight as she goes through the dip. If r = 18.0 meter, compute how fast is the roller coaster traveling at the bottom of the dip?
Two pipes of the same length are both made to vibrate at their lowest resonant frequency. What is the length of the pipes?
although the magnitudes of the equipotentials and electric fields for electrode configurations a and b are consistent
An astronaut of mass 77.4 kg is 29.9 m far out inspace, with both the space ship and the astronaut at rest withrespect to each other. Without a thruster, the only way to returnto the ship is to throw his 0.546 kg wrench directly awayfrom the ship.
A 0.33 kg softball has a velocity of 19 m/s at an angle of 34° below the horizontal just before making contact with the bat. What is the magnitude of the change in momentum of the ball
A small block with mass m1 rests on a frictionless horizontal tabletop a distance r from a hole in the center of the table. A string tied to the small block passes down through the hole, and a larger block m2 is suspended from the free end of the ..
A wire loop of radius 0.50 m lies so that an external magnetic field of magnitude 0.30 T is perpendicular to the loop. The field reverses its direction, and its magnitude changes to 0.20 T in 2.0 s. Find the magnitude of the average induced emf in th..
A transformer with a turns ratio (secondary/primary) of 1:15 is used to step down the voltage from a 120-V wall socket to be used in a battery recharging unit.
Determine the moment of inertia for three children weighing 57.0 lb, 42.0 lb and 78 lb sitting at different points on the edge of a rotating merry-go-round, which has a radius of 12 ft.
A hollow sphere of radius R has a potential on its surface specified by the function V(R,θ) = Vocos2θ. Find the electric potential inside and outside the sphere
A flywheel has a constant angular deceleration of -2.99 rad/s2. Find the time required for the flywheel to come to rest
a block of mass m18 rests on a frictionless surface and is attached to a light cord that is wrapped around a solid
An AC generator has 70 rectangular loops on its armature and total resistance of 9 ohms. Each loop is 12 cm long and 7 cm wide. what will be the maximum output voltage of this generator
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