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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?
The distance between the eyepiece and the objective lens in a certain compound microscope is 24.5 cm. compute the overall magnification of the microscope
A large circus ride has a centripetal acceleration at 6.0 m/s2. If the circular ride has a radius of 11.0 m, what is its velocity at the edge
A railroad car with a mass of 2.46 x 10^4 kg moving at 3.25 m/s collides and joins with two railroad cars already joined together, each with the similar mass as the single car and initially moving in the same direction at 1.49 m/s.
The magnetic field in an electromagnetic wave has a peak value given by B = 3.3uT. Find the peak intensity. Find average intensity
Just after each jumps, that person is moving away from the crate with a speed of 4.40 m/s relative to the crate.
An airplane can be made invisible to radar by coating the plane with a thin layer of an antireflective material. How many dark fringes are observed when 600 nm light illuminates the slides from directly above
Find out an effective coefficient of kinetic friction
What is the smallest thickness of a soap film (n = 1.33) that would appear black if illuminated with 450 -nm light? suppose there is air on both sides of the soap film.
A parallel-plate capacitor has square plates that are 6.00cm on each side and 4.20mm apart. If the potential difference between the plates is 78.0V , how much electrical energy is stored in the capacitor
When two sticks are laid end-to-end they cover a length of 8.32 feet. What is the length of the shorter stick
A drag racer crosses the finish line doing 216 mi/h and promptly deploys her drag chute, What force must the drag chute exert on the 850 kg car to slow it to 45.2 mi/h in a distance of 161 m
A bungee jumper (m = 66.00 kg) tied to a 48.00 m cord, leaps off a 78.00 m tall bridge. What size impulse is exerted on the bungee jumper while the cord stretches
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