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Four identical metallic objects carry the following charges: +1.36, +6.10, -4.24, and -9.34C. The objects are brought concurrently into contact, so that each touches the others. Then they are separated. (a) What is the final charge on each object? (b) How many electrons (or protons) make up the final charge on each object?
Assume that a person can jump straight up a distance of 61 cm on the surface of the earth. How small would a planet have to be so that the person could jump totally off (i.e. jump up and not come down)? Suppose that Earth's radius is 6380 km and that..
A current-carrying wire of length 0.5m is at the Equator. Assuming that the magnetic field of the Earth has magnitude of 5 x 10^-5 T, what current is required to allow the wire to be suspended
Gas is contained in an 7.0 Lvessel at a temperature of 20°C and a pressure of 8.8 atm. Determine the number of moles of gas in the vessel
A boy kicks a ball horizontally near the edge off a boardwalk, with an initial speed of 9.0 m/s. Determine the height of the boardwalk above the water
The inductance of a closely wound coil is such that an emf of3.0 mV is induced when the current changes at the rate of4.6 A/s. How many turns does the coil have
Dinoflagellates are single-cell creatures that float in the world's oceans; many types are bioluminescent. When disturbed by motion in the water, What is the power of the flash in watts
A 5.0 nC point charge sits at x = 0. At the same time, a 4300 N/C uniform electric field (created by distant source charges) points in the positive x-direction. A. At what point along the x-axis, if any, would a proton experience no net force? B. ..
Two spheres, one with mass M, radius R, and the other mass 2M,radius 3R, are released from rest at a distance of 12R between their centers. What is the velocity of each sphere when they collide?
A compass originally points North; at this location the horizontal component of the Earth's magnetic field has a magnitude of 2e-5 T. What is the magnetic dipole moment of the bar magnet
A student places an object on the 5.0 cm mark of the meter stick. He places a positive lens that he knows has a focal length of 15.0 cm at the 30.0 cm mark on the meter stick. From the data what is the focal length of the negative lens
You can turn the crank at a maximum rate of 3 turns per second, but hand crank is connected to the coil through a set of gears that makes the coil spin at a rate 6 times larger than the rate at which you turn the crank. What is the maximum emf you ca..
You have two lenses separated by 25cm. Lens one is onthe left it has a focal length of 15cm. What is the image going to look like
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