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The plates of a 631-pF parallel plate capacitor are separated by 1.21 mm. If the plates are charged so that the charge stored on each plate is 6.31 nC, what is the magnitude of the electric field in the capacitor? Write your answer to three significnat figures (because we are looking for a magnitude, your answer should be positive).
Calculate the angular velocity? of an electron orbiting a proton in the hydrogen atom, given the radius of the orbit is 0.500x10-10 m . You may assume that the proton is stationary and the centripetal force is supplied by Coulomb attraction.
A baseball pitcher can throw a ball with a speed of 40. He is in the back of a pickup truck that is driving away from you. He throws the ball in your direction, and it floats toward you at a lazy 30. What is the speed of truck.
A speedboat moving at 33.0 m/s approaches a no-wake buoy marker 100 m ahead. The pilot slows the boat with a constant acceleration of ?3.20 m/s2 by reducing the throttle. (a) How long does it take the boat to reach the buoy? (b)What is the velocit..
If a bird were to start out from the origin (where the student starts) and fly directly (in a straight line) to the school, illustrate what distance would the bird cover? Express your answer in miles.
Consider a standing wave on the string with a frequency equal to the fifth harmonic (fn = nf1 with n = 5). How many nodes and antinodes does this standing wave possess.
On a workday the average decibel level of a busy street is 72.0 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 50 every minute on a weekend, what is the decibel level of street.
Ignoring the heat lost along the length of the poker, find out the amount of heat conducted from one end of the poker to the other in 3.0 s.
An arrow is fire with a speed of 20m/s at the block of Styrofoam resting on a smooth surface. The arrow penetrates a certain distance into the block before coming to rest relative to it.
A solid block of mass m2 = 0.5 , at rest on a horizontal frictionless surface, is linked to a relaxed spring (with spring constant k = 150 whose other end is fixed. Another solid block of mass m1 = 2.4 and speed v1 = 2.2 collides with the 0.50 blo..
A 1000 kg experimental rocket sled on a level frictionless rail is loaded wiht 50kg of propellant. It exhausts the propellant in a 20-s "burn". If rocket, initially at rest, moves at 150m/s after the burn, what impulse is experienced by the rocket..
what is the volume of an iron atom. What is the ratio of the mass density of girder A to the mass density of girder B.
Two blocks are connected by a string. The smooth inclined surface makes the angle of 35 degrees with the horizontal, and the block on the incline has a mass of 5.7 kg.
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