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Question
Explain where the electric energy is stored in a normal capacitor with a dielectric between two plates. (b 5') A charged parallel-plate capacitor with charge Q is disconnected from the power supply. If we increase the area of the plate without changing other parameters, how does the voltage V across the capacitor change?
A car radio draws 0.13 A of current in the auto's 12-Velectrical system. How much electric power does the radio use?What is the effective resistance of the radio?
questiona rectangular loop has 85 turns with an area of 0.225 m2 and lies in a uniform magnetic field of 0.28 t.
Roland is running at an average velocity of 10.56 meter per second over level ground. find how much average horizontal force must he produce during the ground contact phase
The A string on a cello vibrates in its first normal mode with a frequency of 220 Hz. Determine the frequency of vibration when the string vibrates in three segments
A 72 person stands on a uniform ladder 4.5 long, that weighs 75. The floor is rough; hence, it exerts both a normal force, and a frictional force, on the ladder. The wall, on the other hand, is frictionless; it exerts only a normal force.
question a 65-kg person jumps from a window to a fire net 18m below which stretches the net 1.1m. assume that the net
A relief airplane is delivering a food package to a group of people stranded on a very small island. What is the speed of the package when it hits the ground in mph
Light of intensity 0.5 W/m2 passes through the pupil of one of your eyes and eventually falls on your retina. how much light energy passes through in one minute
At a rock concert, the engineer decides that the music isn't loud enough. He turns up the amplifiers so that the amplitude of the sound, By what percentage does the intensity increase
A system consists of two indistinguishable spin-1 fermions, both confined inside the same box of length L centred on the origin. The particles do not interact with each other.
The image of a crayon appears to be 21.5 cm behind the surface of a convex mirror and is 2.39 cm tall. The mirror's focal length is 40.9 cm. a) How far in front of the mirror is the crayon positioned? Answer in units of cm.
A dad pushes tangentially on a small hand-driven merry-go-round and is able to accelerate it from rest to a frequency of 16rpm in 10.0s. What force is required at the edge
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