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A hollow metal sphere has inner and outer radii of 7 cm and 10 cm radii. A point charge is located at the center is located at the center of the sphere. The surface charge density on the inside surface is -300nC/m2. The surface charge density on the exterior surface is +300 nC/m2. What are the strength and direction of the electric field at points 4, 8, and 12 cm from the center?
A 200-turn retangular coil with an area of 20.0 cm x 30.0 cm is mounted on a rotating frame, What is the maximum emf in the coil
A 0.300-kg mass, attached to the end of a 0.750-m string, is whirled around in a smooth level table. If the highest tension that the string can withstand is 250 N, after that what highest linear speed can the mass have if the string is not to brea..
what are the magnitude and direction of its acceleration. A potential difference of 80 mV exists between the inner and outer surfaces of the cell membrane. The inner surface is negative relative to the outer surface. How much work is required to ej..
A thin disk of uniform density, mass 5kg and radius :25m, rests on a frictionless table. Find the linear and angular speed of the disk clay system after the impact
A convex lens of 10 cm focal length is placed in contact with a convex lens of 15 cm focal length. What is the focal length of the combination
A woman lies on a weightless board across two scales. Her feet are directly over the right scale. How far above her feet is her center of mass
If the string is 9.5 long, has a mass of 30 and is pulled taut with a tension of 8.50, how much time does it take for a wave to travel from one end of string to the other?
Sketch complete free body force diagrams for each crate. A person with his ear to the ground sees a huge stone strike the concrete pavement a moment later 2 sounds are heard from an impact one travels in the air and the other in concrete.
The left ventricle of the heart accelerates blood from rest to a velocity of +24 cm/s^2. How much time does it take for the blood to reach its final velocity
A hoist is powered by an electric motor that draws 4.82 kilowatts of electric power. How long will it take this hoist to lift a 2550 kg mass to the top of a 75.4 m high building
A 2.3 L volume of ideal neon gas (monatomic) is at a pressure of 5.7 atmospheres and a temperature of 390 K. find The number of neon atoms in the gas
Two lenses, separated by a distance of 22.1 cm, are used in combination. The first lens has a focal length of +26.0 cm; the second has a focal length of -15.0 cm. What is the final image distances relative to the second lens
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