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A 15 g piece of Styrofoam carries a net charge of -5.1 µC and floats above the center of a large horizontal sheet of plastic that has a uniform charge density on its surface. What is the charge per unit area on the plastic sheet?
A 57.0-m length of coaxial cable has an inner conductor that has a diameter of 2.58 mm and carries a charge of 8.10 µC. obtain the potential difference between the two conductors
A bullet is fired from a gun whose barrel is 0.600 m long. The bullets mass is 5.00 g and its velocity is 300m/s when it leaves the gun's muzzle. what was the average force acting on the bullet
Note that one chain connects the upper pulley to the ceiling and a second chain connects the lower pulley to the crate. Assume that the masses of the chains, pulleys, and ropes are negligible and the crate is rising with an acceleration of 3.3 m/s..
A fun-loving 11.4 {rm kg} otter slides up a hill and then back down to the same place. If she starts up at 5.75 {rm m/s} and returns at 3.75 {rm m/s}, how much mechanical energy did she lose on the hill.
The wave function for a wave on a taut string is y(x, t) = 0.335 sin(9?t ? 3?x + ?/4) where x and y are in meters and t is in seconds. What is the energy contained in each cycle of the wave
If John Glenn weighed 640 N on Earth's surface, a) how much would he have weighed if his Mercury spacecraft had (hypothetically) remained at twice the distance from centre of Earth? b) Why is it said that an astronaut is never truly "weightles".
q1. a uniform solid ball rolls smoothly along a floor then up a ramp inclined at 20.4o. it momentarily stops while it
At 20C and 750 torr pressure, the mean free paths for argon gas(Ar) and nitrogen gas(N) are lambdaAr = 9.9 x 10^-6 cm, What is the mean free path of argon
A 6.3 ?C point charge and a ?1.7 ?C point charge are separated by a distance of 0.00034 m. What is the electric potential energy of this system
Charges of 4.0 mC and - 6.0mC are placed at two corners of an equilateral triangle with sides of 0.10 m. At the third corner, what is the electric field created by these two charges
An 8 Ohm speaker is connected across the output terminals of a power amplifier that delivers 72 W. What is the current supplied to the speaker
A kicker punts a football from the very center of the field to the sideline 37 yards downfield. What is the direction of the net displacement of the ball?
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