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A hollow metal sphere has inner radius a, outer radius b, and conductivity sigma. The current I is radially outward from the inner surface to the outer surface.
a) Find an expression for the electric field strength inside the metal as a function of the radius r from the center.
b) Evaluate the electric field strength at the inner surface of a copper sphere if 0.70cm and 28A.
c) Evaluate the electric field strength at the outer surface of a copper sphere if 2.9cm and 28A?
A mountain climber, in the process of crossing between two cliffs by a rope, pauses to rest. She weighs 521 N. As the drawing shows, Find the tensions in the rope to the left and to the right of the mountain climber
What quantum number of the hydrogen atom comes closest to giving a 500-nm-diameter electron orbit, What is the electron's energy in this state
A bungee cord is stretched between two poles with a force of 443 N. What is the velocity of a wave on this bungee cord
Compute the density of entropically raised element of air
A constant electric field E=100 N/C*i is present throughout a region of space that includes the plane bounded by the x, compute The electric flux at the plane's surface
The punter on a football team tries to kick a football so that it stays in the air for a long "hang time." what is the "hang time"
An air spaced parallel plate capacitor is connected to a 12 v battery. If a slab of pyrex glass is inserted between the plates filling the gap, find the new capacitance of the capacitor
If each rock strikes the fixture travelling at 10.0 {rm m}/{rm s} horizontally and rebounds at 2.00 {rm m}/{rm s} backwards, how high above the lowest point does collision make your light fixture swing?
A boat moves through the water of a river at 10-m/s relative to the water, regardless of the boat's direction. If the water in the river is flowing at 1.6-m/s.
A 390 nm thick film floats on a puddle of water. When illuminated normally with 700 nm light there is no reflection, but 400 nm light is strongly reflected. What is the film's index of refraction
A worker pushed a 27kg block 7.4m along a level floor at constant speed with a force directed 29° below the horizontal.
The head of a rattlesnake can accelerate at 50 m/s^2 in striking a victim. If a car can have the same acceleration, how long would it take for it to reach a speed of 100 km/h from rest.
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