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An electron is released a short distance above the surface of the Earth. A second electron directly below it exerts an electrostatis force on the first electron just great enough to cancel the gravitational force on it. How far below the first electron is the second?
Two stationary positive point charges, charge 1 of magnitude3.35 nC and charge 2 of magnitude 1.75 nC, are separatedby a distance of 39.0 cm. An electron is released from rest atthe point midway between the two charges, and it moves along the line..
A 10.0 kg crate slides along a horizontal frictionless surface at a constant speed of 4.0 m/s. What is the speed of the crate when it arrives at the lower surface
A mass m = 4.5 kg hangs on the end of a massless rope L = 2.01 m long. The pendulum is held horizontal and released from rest. What is the magnitude of the tension in the string at the bottom of the path
Calculate the heat capacity of a gas sample from the following information : The sample comes to equilibrium in a flask at 298.15 K and 121.3 kPa. A stopcock is opened briefly, allowing pressure to drop to 101.3 kPa.
Find the wavelength of light emitted by a hydrogen atom, when the electron moves from n = 7 quantum state to n = 5 quantum state
a spinning disc rotating at 130 rev/min slows and stops 31 s later. how many revolutions did the disc make during this time
In a rectangular coordinate system, a positive point charge q= 4.50 nC is placed at the point x= 0.170 m, y=0, Find the direction of the electric field from the positive x axis.
A -10nC charge is located at (0,0) on the x-y axis. What are the magnitudes of the electric field vectors at positions: (5 cm, 5 cm) and (0 cm, 5 cm)?
Two parallel wires 10 cm apart carry currents of 18 A. What is the magnetic force between two wires for both case
a playground merry go round has a radius of 4.40 m and a moment of inertia of 245kg.m^2 and turns with negligible friction about a vertical axle through is center. What is the average power supplied by the child
As you zip through space in your PPS (personal propulsion suit), your pulse rate, as you count it, is 121 bpm, How fast are you moving with respect to the Moon
You have available lenses of focal lengths 2.0 cm, 4.0 cm, 8.0 cm, and 16.0 cm. what is the maximum magnification you could achieve
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