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Two point charges q1 = 4.0 ?C and q2 = -8.0 ?C are placed along the x-axis at x1 = 0 m and x2 = 0.20 m, respectively. What is the electric potential energy of this system of charges?
An object is released from rest and falls in free fall motion. The speed v of the object after it has fallen a distance y is given by v2 = 2gy, what is the percent uncertainty in the calculated value of g
A passenger hanging onto a strap notices that an adjacent unused strap makes an angle of 14? to the vertical. What is the radius of the turn
A flywheel in the form of a uniformly thick disk of radius 1.68 m, Calculate the constant torque required to stop it in 4.50 min
A merry-go-round is a common piece of playground equipment. A 3.0-m-diameter merry-go-round with a mass of 230kg is spinning at 17rpm, What is the merry-go-round's angular velocity, in rpm, after John jumps on
Assume we have an infinitely long wire carrying a current of 2-A. It is bent into an L-shape extending into positive infinities along the x- and y- axes. Find out the magnitude of the magnetic field at a point P with coordinates (0.3 m, 0.3 m).
A 6.2\({\rm ft}\) tall shopper in a department store is 18\({\rm ft}\) from a convex security mirror, What is the mirror's radius of curvature
However, the current increases by just 0.11 A when R1 is removed, leaving R2 connected across the battery. Find (a) R1 and (b) R2.
A beanbag is thrown horizontally from a dorm room window a height h above the ground. find the direction of the beanbag's velocity
Alpha particles of kinetic energy 5.10 MeV are scattered at 90° by a gold foil. What is the impact parameter
A ball with a vertically downwards initial velocity v(0) = 3 m/s collides with a fixed inclined surface. find the velocity of the ball after it rebounds
The nucleus of a helium atom contains two protons. In a simple model of this nucleus, What is the electric potential energy of the two protons
One of Einstein's postulates says that nothing travels faster than the speed of light in a vacuum, c, what limit does this place on the numerical value for n
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