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A rock is dropped straight down from the top of a 49.2 meter building. How long does it take for the rock to hit the ground?
How fast is the rock moving on impact?
Roughly, how fast is this in miles per hour?
A flat stack of two materials, the first of index of refraction 1.52 and thickness 2 mm, and the second of index of refraction 1.63, What is the size (radius) of the circle of light
Three equal positive point charges of magnitude Q = 6.00? C are located at three corners of a square of edge length d = 2.6 cm. A negative charge -18.00? C is placed on the fourth corner.
It is fairly easy to strip the two electrons off a helium atom, leaving a bare nucleus of two neutrons and two protons. What is the necessary voltage difference
A steel beam that is 7.00m long weighs 330N. It rests on two supports, 3.00m apart, with equal amounts of beam extending from each end. Suki, who weighs 505 N, stands on the beam in the center and then walks toward one end. How close to the end can s..
The ball is free from rest with the line taut and horizontal (θ = 90.0°). At what angle θ (measured from the vertical) would the fishline break.
A cannon is fired horizontally with a velocity of 35.0 m/s from a height of 10 meters. With what total velocity does it strike the ground
A ball with a mass of 0.5kg and a diameter of 0.4 m floats (so acceleration =0 ) in the ocean, what is the buoyant force of the ball
The entrance to a large lecture room consists of two side-by-side doors, one hinged on the left and the other hinged on the right. What is the diffraction angle of the sound under each of the following situations
An isolated copper sphere of radius 4.85cm, at first uncharged, is illuminated by ultraviolet light of wavelength 244nm. The work function for copper is 4.70 eV. What charge does the photoelectric effect induce on sphere.
A bullet is fired through a board 7.0 cm thick in such a way that the bullet's line of motion is perpendicular to the face of the board, Find the total time the bullet is in contact with the board
A 4100-kg truck traveling with a velocity of 13 m/s due north collides head-on with a 1300-kg car traveling with a velocity of30 m/s due south. What is the momentum of each vehicle prior to the collision
What is acceleration of an object sliding down to plane
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