Electric force of repulsion
Question: How many electrons must be removed from each of two 4.6-kg copper spheres to make the electric force of repulsion between them equal in magnitude to the gravitational attraction between them?
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It has a downwards force of 10 kN at 1 m in from the RHS and a downwards force of 5 kN at 1 m in from the LHS. Calculate both the bendin moment and the maximum stress in the beam.
A tiny sphere with a charge of q = +6.4 µC is attached to a spring. Two other tiny charged spheres, each with a charge of ?4.0-µC, are placed in the positions shown in the figure, in which b = 4.1 cm. The spring stretches 5.0 cm from i
The electric potential at A is -60.5 V, and the electric potential at B is +25.1 V. Determine the charge of the particle. Include the algebraic sign (+ or ?) with your answer.
How many electrons must be removed from each of two 4.6-kg copper spheres to make the electric force of repulsion between them equal in magnitude to the gravitational attraction between them?
The father of a junior high school student wants to determine the most popular book among junior high students. Select the sample with the least potential bias.
The capacitor is then disconnected from the battery, and the spacing between the capacitor plates is doubled. As a result of this change, what is the new voltage between the plates of the capacitor?
Assuming no heat loss to the surrounding environment, determine the minimum duration of time necessary for a 100 W aquarium tank heater to raise the temperature of 20.0 gallons of water by a difference of 10.0°C.
What charge (magnitude and algebraic sign) should be fixed to one of the empty corners, so that the total electric potential at the remaining empty corner is 0 V?
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