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Initially, sphere A has a charge of -50e and sphere B has a charge of +20e. The spheres are made of conducting material and are identical in size. If the spheres then touch, what is the resulting charge on sphere A?
The left end of a long glass rod 8.00cm in diameter and with an index of refraction of 1.60 is ground, Find the position of the image of the arrow formed by paraxial rays incident on the convex surface
A 2.10kg snowball is fired from a cliff 8.55 m high with an initial velocity of 11.90 m/s, directed 47.0° above the horizontal. (a) Using energy techniques, find speed of the snowball as it reaches the ground below the cliff. What is that speed (b) i..
A high-diver of mass 70 kg jumps off a board 10 m above the water. If, 2 s after entering the water his downward motion is stopped, what average upward force did the water exert on him
A person has a near point of NP = 85 cm and a far point of FP = 210 cm. Write a formula for the power, P1, of the upper portion of the bifocals, in terms of the given quantities, that will enable the person to see distant objects clearly
What approximations can you make about reactances when the series RCL circult is connected to a battery, Which reactance would be the most important
A positive charge of q1 is located 4.40 m to the left of a negative charge q2. The charges have different magnitudes. How far to the left of the negative charge is one spot
A model airplane with a mass of 0.743 kg is tethered by a wire so that it flies in a circle 30.4 m in radius. Find the torque the net thrust produces about the center of the circle
An AC generator consists of eight turns of wire, each having area A = 0.0890 m2, with a total resistance of 11.4 ?. Determine the induced emf and current as functions of time
One of Einstein's postulates in formulating the special theory of relativity was that the laws of physics are the same in reference frames that
You push your physics book 1.70 malong a horizontal table top with a horizontal force of2.20 N. The opposing force of frictionis 0.597 N. What is the work done on the book by the friction force
A coordinate system is chosen such that the sheets lie in the yz-plane, with sheet A at x = 0. A graph of the electric field as a function of x is shown at right below. Find the charge σB (sign and magnitude) of sheet B in terms of charge density ..
A 125 g wire is held under a tension of 218 N with one end at x = 0 and the other at x = 12.0 m. At time t = 0, pulse 1 is sent along the wire from the end at x = 12.0 m. At time t = 25.5 ms, pulse 2 is sent along the wire from the end at x = 0. A..
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