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A parallel-plate air capacitor has a capacitance of 500pF and a charge of magnitude 0.250uC on each plate. The plates are 0.700mm apart. What is the electric-field magnitude between the plates? What is the surface charge density on each plate?
Suppose the shuttle increases its speed so that it has a length of 36.1 m when viewed by a stationary observer. How long would it take to complete one orbit
A parallel plate capacitor has square plates with sides of length 10 cm. The distance between the plates is 4 mm. What is the amount of charge on each plate
describe why pluto was demoted from the planet status. be sure to describe what class of planetoid it is considered now
A 100 g (mass) bouncy ball has a downward velocity of 10 m/s right before hitting the ground. How long was the ball in contact with the ground to the nearest second
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the mass of the star
A factory worker accidentally releases a 200 kg crate that was being held at rest at the top of a ramp that is 3.9 m long, How fast is the crate moving as it reaches the bottom of the ramp
If the person in the figure lowers his forearm with mass 1.2kg to be 15 degrees below horizontal, how much force must the biceps exert to hold the 500g ball
An airplane propeller is 2.02 min length (from tip to tip) with mass 109 kg. The propeller is rotating at 2000 rev/min about an axis through its center. What is its rotational kinetic energy
A step-down transformer (turns ratio = 1:8) is used with an electric train to reduce the voltage from the wall receptacle to a value needed to operate the train, What is the current in the primary coil?
A carpenter carries his 8kg toolbox at constant speed up 2 flights of stairs, each 3m high, in one minute. How much work did the carpenter do in carrying the toolbox up 2 flights
A uniform electric field exists in the region between two oppositely charged plane parallel plates. Find the speed of the electron when it strikes the second plate
A person's body is covered with 1.8 m2 of wool clothing. How much heat per second does the person lose due to conduction
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