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Angel Falls in southeastern Venezuela is the highest uninterrupted waterfall in the world, dropping 979 m (3212 ft). Assume that it takes 14 s for the water to fall from the lip of the falls to the river below. If the water lands 55 m from the base of the vertical cliff, what was its horizontal speed at the top?
A ship sets out to sail to a point 148km due north. An unexpected storm blows the ship to a point 109km due east of its starting point.
A 23 gram bullet traveling 230m/s penetrates a 2kg block of wood and emerge clearly at 170m/s. If the block is stationary on a frictionless surface when hit, how fast does it move after bullet emerges.
Certain stars at the end of their lives are thought to collapse combining their protons and electrons together to form a neutron star. Such a star could be thought of as a giant atomic nucleus.
hysicists model a magnetic field by assigning to every point in space a vector that represents the strength and direction of the field at that point. Two magnetic fields that exist in the same region of space may be added as vectors at each point to ..
A hunter aims directly at a target (on the same level) 101m away. If the bullet leaves the gun at a velocity of 203m/s, by how much will it miss the target.
A 65.0 kg base runner begins his slide into second base when he is moving at a speed of 4.5 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base.
Use approximate calculations assuming constant current during the output pulse. Calculate the ampere-hour rating of the battery so it lasts for five years.
If, instead, the gold is drawn out into a cylindrical fiber of radius 1.5µm, what is the length of fiber.
Calculate the maximum allowable force that can be applied to stop a 1000 kg vehicle if the maximum allowable acceleration is 2.5 g.
A sine wave is traveling along a string. The time for a particular point to move from maximum displacement to zero is 0.880 s. What is the period?
define the magnitude of the torque on the dipole.
A uniform density cube of mass m, side 2b, and center at C is placed on a fixed horizontal cylinder of radius r and center O in Earth's gravitational field. The cube is originally put so that C is centered above O, but it can roll from side to side w..
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