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An electron with an initial speed of 660,000 m/s is brought to rest by an electric field.
1. What was the potential dissimilarity that stopped the electron?
2. What was the initial kinetic energy of the electron, in electron volts?
Two rods of equal length L = 1.51 m form asymmetric cross. The horizontal rod has a chargeof Q = 100.0 C, and the vertical rod a charge of-Q = -100.0 C. The charges on both rods are distributed uniformly along their length.
A car is traveling 23 m/s when the driver sees a child standing in the road. He takes 0.8 s to react, then steps on the brakes and slows at 6.0 m/s2. Explain how far does the car go before it stops?
The collision between a hammer and a nail can be considered to be approximately elastic. Estimate the kinetic energy acquired by a 11-g nail
When at cruising altitude, a typical airplane cabin will have an air pressure equivalent to an altitude of about 2510 m. During the flight, what is the net force on one ear drum due to this pressure difference
A solid cylinder of mass 2.00kg and radius 1.50x10^-2m is free to rotate on a frictionless axle. determine the angular acceleration of the cylinder
A very long straight wire carries current I. In themiddle of the wire a right-angle bend is made. Determine the magnetic fieldat the center of the arc
A potter's wheel is rotating arounda vertical axis through its center at a frequency of 1.8 rev/s. What is the frequency of the wheel after the claysticks to it
a doorframe is twice as tall as it is wide. there is a positive charge on the top left corner and an equal but negative
An intergalactic rock star bangs his drum every 1.70 s. How fast is the rock star moving relative to the earth
Electrons are located at the points (0,1), (3,4), (1, 2). Find the net electric field at the origin
An acoustic signal is composed of the first three harmonics of a wave of fundamental frequency 470 Hz. If these harmonics are described, in order, by cosine waves by amplitudes of 0.710, 0.170, and 0.790, what is the total amplitude of the signal at ..
A vertical spring with a spring constant of 470N/m is mounted on the floor. From directly above the spring, which is unstrained, a 0.30 kg block is dropped from rest. It collides with and sticks to the spring, which is compressed by 2.8cm in bring..
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