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Two very small spheres are initially neutral and separated by a distance of 0.62 m. Suppose that 9.3 x 1013 electrons are removed from one sphere and placed on the other. What is the magnitude of the electrostatic force that acts on each sphere?
The position of a particle moving along an x axis is given by x = 14.0t2 - 3.00t3, where x is in meters and t is in seconds. find the maximum positive velocity reached by the particle
A 100kg mass is on an inclined plane of 30 degrees. It's connected to a second unknown mass that hangs over a frictionless pulley. What is the unknown mass required to maintain an acceleration down the place of 1m per sec
Block A, with a mass of 2.4 kg, is stationary, while block B, with a mass of 8.6 kg, is moving at 8.1 m/s. What is the speed of the center of mass of this two-block system
A wave source generates circular waves that spread out from it on the surface of a pond. The wavelength of these waves is 6.00 cm. (a) At some instant a crest is passing point A.
a binary star system has a period of 7.7e6 7700000 s. it is noted that one star is moving twice as fast as the other
1 . a wooden box item sits on a horizontal wooden board. the coefficient of static friction between the box and the
a 0.482-kg toy car is powered by one d cell 1.50 v connected directly to a small dc motor. the car has an effective
Assume that Newton's law of universal gravitation can be applied to these two students and find the gravitational force (in Newtons) that one student exerts on the other when they are separated by 0.493 m. Consider entering the answer using scient..
for small stretches the achilles tendon can be modeled as an ideal spring. experiments using a particular tendon showed
Unless otherwise stated, all objects are located near the Earth's surface, where g = 9.80 m/s2. A student weighing 660N crouches on a scale and suddenly springs vertically upward
The inductance of a closely packed coil of 350 turns is 9.5 mH. Calculate the magnetic flux (per winding) through the coil when the current is 5.0 mA
a ball of mass 0.150 kg is dropped from rest from a height of1.25m. It rebounds from the floor to reach a height of 0.960m. What impulse was given to the ball by the floor
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