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There are four charges, each with a magnitude of 2.0μC. Two are positive and two are negative. The charges are fixedto the corners of a 0.30 m square, one to a corner, in such a waythat the net force on any charge is directed toward the center ofthe square. Find the magnitude of the net electrostatic forceexperienced by any charge.
A cockroach of mass m lies on the rim of a uniform disk of mass 4m that can rotate freely about its center like a merry-go-round. estimate the angular velocity of the cockroach-disk system
Suppose that the coefficient of kinetic friction between Zak's feet and the floor, while wearing socks, is 0.250. Knowing this, what distance d will he slide before stopping
When light with a wavelength 480 nm or shorter shines on a metal surface, a current is measured. A. What is the work function of this metal B. What is the maximum kinetic energy an electron will have if violet light (380 nm) shines on the surface
A ball is dropped from rest from the top of a 6.30-m-tall building, falls straight downward, collides in-elastically with the ground, How many bounces can the ball make
What is average kinetic energy of each helium atom
A simple pendulum makes 139 complete oscillations in 3.10 min at a location where g = 9.80 m/s2. Find the length of the pendulum
2.00 mol of a monaromic gas at atmospheric pressure has a total internal energy of 7.48x10^3J. What is the volume occupied a rigid cylinder by the gas
What minimum horsepower must a motor have to be capable to drag a 290 box along a level floor at a speed of 1.05 if the coefficient of friction is 0.50.
A lighter-than-air balloon and its load of passengers and ballast are floating stationary above the earth. Ballast is weight (of negligible volume) that can be dropped overboard to make the balloon rise.
A 0.500-kg mass on a spring has velocity as a function of timegiven by vx(t) = (3.60cm/s) sin[(4.71s-1)t -?/2]. What is the force constant of the spring
The rechargeable batteries for a laptop computer need a much smaller voltage than what a wall socket provides. What is the current coming from the wall socket
a boy is laying on a sled wich is on an ice covered hillinclined at an anlge of 15 degrees if the boy, what is the force pulling them down the hill
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