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In an experiment on standing waves, a mechanical vibrator drives a string. Both ends of the string are fixed. The distance between the fixed ends is 80.0 cm. Tension in the string is produced by hanging a mass over a pulley. At 60.0 Hz, 5 antinodes are observed on the string. If the mass per unit length of the string is 0.049 kg/m, how much mass is hanging over the pulley.
A child and sled with a combined mass of 48 kg slide down a snow-covered (and frictionless) hill. Find the kinetic energy at the top of the hill
A 25.0-g object moving to the right at 16.0 cm/s overtakes and collides elastically with a 9.0-g object moving in the same direction at 15.0 cm/s
If a virtual image is formed 10.0 cm along the principal axis from a convex mirror of focal length -15.0 cm, how far is the object from the mirror
When a missile is shot from one spaceship toward another, What is the relative velocity of the two ships
A 68.0-kg person throws a 0.0500-kg snowball forward with a ground speed of 27.0 m/s. What are the velocities of the two people after the snowball is exchanged
A horse draws a sled horizontally on snow at constant speed. The horse can produce a power of 1.095 hp. What is the speed with which the sled moves across the snow
A racer starts her car from rest and accelerates at 10m/s2 for a distance of 400m (1/4mi)
define the magnitude of the acceleration of the elevator. A 300 kg piano slides 4.1m down a 30 degree incline and is kept from accelerating by the man who is pushing back on it parallel to the incline. The effective coefficient of kinetic friction ..
How long does it take for amplitude to drop to half its initial value . How long does it take for mechanical energy to drop to half its initial value.
A brave child decides to grab on to an already spinning merry-go-round. What is the moment of inertia of the merry-go-round with respect to its central axis
A boy in a wagon is moving at 3.1 m/s east when another boy begins pulling on the wagon in the direction opposite to its motion at 1.25 m/s^2. (a) How long does it take to give the wagon a velocity of 7.4 m/s west? (b) How far from the starting po..
Unpolarized light with an intensity of 660 W / m2 is incident on a polarizer with an unknown axis. What is the angle between the axes of the polarizers
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