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At the surface of an electrically charged solid conducting sphere the electric field has a magnitude of 458 N/C and the electric potential is 164 V lower than it is infinitely far from the sphere.
a) Does the sphere have too many electrons or too few?
b) How many electrons?
a fisherman is dozing when a fish takes the line and pulls it with a tension F the spool of the reel is at rest intialy, find the magnitude of the final angular velocity of the spool
Light strikes a metal surface, causing photoelectric emission. The stopping potential for the ejected electrons is 3.4 V, What is the wavelength of the incident light
Find the smallest particle size (density 2.65 grams per cubic cm) that will be removed in a horizontal grit chamber 10 meters long and 1.0 meter deep if the flow rate is 1000 cubic meters per hour. Suppose temperature is 25 ºC.
A turntable 1.90 m in diameter rotates at 78.0 rpm . Two speakers, each giving off sound of wavelength 30.6 cm, find the greatest beat frequency the listener
A 71 kg parent and a 19 kg child meet at the center of an ice rink. They place their hands together and push. what is the magnitude of the parent's acceleration
Copper has an electrical resistivity %u03C1 = 1.72 x 10-8 %u03A9m. What is the electrical resistance of a copper wire with a radius of 1.0 mm and a length of 25 m
The component of the external magnetic field along the central axis of a 69-turn coil of radius 23.0 cm decreases from 1.90 T to 0.400 T in 1.70 s. what is the magnitude of the induced current in the coil
A speeder is pulling directly away and increasing his distance from a police car that is moving at 26 m/s with respect to the ground. Find the speeder's speed with respect to the ground
A luminous object is 3.60m from a wall. You are to use a concave mirror to project an image of the object on the wall, How far should the mirror be from the wall
A lunar lander is landing on the moon from 5.0 m above the surface, with a downward speed of 0.8 m/s. With the engine off, it is in free fall. find the speed of the lander just before it hits the surface
A raft made of wood has a density of 600 kg/m^3. Its surface area is 5.9 m^2 and its volume is 0.6 m^3. how much of the raft is below water
A positive charge of 1.100? C is located in a uniform field of 9.00×104 N/C. How close are the two charges
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