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The electric field just above the surface of the charged hollow drum of a photocopying machine has a magnitude E of3.0E+5 N/C. What is the surface charge density on thedrum if it is a conductor? ((assume it is the shape of acylinder))
A nonconducting spherical shell, with an inner radius of 4 cm and an outer radius of 6 cm, has charge spread nonuniformly through its volume between its inner and outer surfaces. The volume charge density ? is the charge per unit volume, with the uni..
An object is placed 100 cm in front of a lens of focal length 20 cm. A second lens is placed 35 cm beyond the first, what is the height of the final image
A particular constant, horizontal force exerted on a particular object free to slide on a level, what is the new value of acceleration
A 1.5-H inductor is connected in series with a 200-Ω resistor through a 15-V dc power supply and a switch, what is the maximum energy stored by the inductor
The terminal speed of a sky diver is 124 km/h in the spread-eagle position and 338 km/h in the nosedive position. Assuming that the diver's drag coefficient C does not change from one position to the other
Four equal positive point charges, each of charge -14 C , are at the corners of a square of side 12cm.What charge should be placed at the center of the square so that all charges are at equilibrium? Solve using only Biot-Savart and maxwell's equation..
A block whose weight is 41.0 N rests on a horizontal table. A horizontal force of 36 N is applied to the block, what will be the block's acceleration? (If not, enter 0.)
On Mars, where air resistance is negligible, an astronaut drops a rock from a cliff and notes that the rock falls about d meters during the first t seconds of its fall. Assuming the rock does not hit the ground first, how far will it fall during t..
A stationary block of mass M - m is struck by a bullet of mass m traveling at speed v0. During the impact, obtain the speed of the block
The pilot of an aircraft wishes to fly due west in a 37.70 km/h wind blowing toward the south. The speed of the aircraft in the absence of the wind is 191 km/h.
A sign has a mass of 1050 kg, a height h = 1 m, and a width W = 4 m. It is held by a light rod of length 5 m that is perpendicular to a rough wall. What is the smallest value of the coefficient of friction
A wire 4 m long and with a mass of 0.5 g is under a tension of 112N. It is made out of the material aluminum. (a)What is the speed of transverse waves in the wire
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