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A 115 V fish-tank heater is rated at 120 W
a) Calculate the current through the heater when it is operating.
b) resistance.
compute the distance from the central maximum to the first bright region on either side of the central maximum.
What is the magnitude of the electrostatic force the molecule exerts on it?
A string under a tension of 47.00N is used to whirl a rock in a horizontal circle of radius 2.60 m at a speed of 21.0 m/s. The string is pulled in and the speed of the rock increases.
Given an isothermal expansion of gas from 1.0 to 2.0 cubic meters in a piston-cylinder arrangement where pressure varies according to P= 1.2 atm -.062 atm/ m^3 V, How much work was done by the gas
To store the energy produced in 1hour by a 110 electric power plant, how many cubic meters of water will have to be pumped from the lower to the upper reservoir? Suppose the upper reservoir is 510 meters above the lower one, and we can neglect the sm..
A laboratory vacuum pump can reduce the pressure to 1.0 × 10^-7 Pa. If the volume of the chamber is 0.500m^3 and the temperature is 27°C
Three equal point charges, each with charge 1.95 , are placed at the vertices of an equilateral triangle whose sides are of length 0.400 . What is an electric potential energy of the system? (Take as zero the potential energy of the three charges ..
A 50g ball travelling at 25m/s is bounced off a brick wall and rebounds at 22m/s. A high speed camera records this event. If the ball is in contact with the wall for 3.5ms, what is the average acceleration of the ball throughout this time interval..
What is the magnitude
A parallel plate capacitor has a capacitance of 8.0 µF when filled with a dielectric. estimate the dielectric constant of the dielectric
How long after the arrow was shot must the apple be dropped, in order for the arrow to pierce the apple as the arrow hits the tree.
Protons are projected with an initial velocity v0 = 10360 m/s into a region where a uniform electric field E = 670 N/C is present. The protons are to hit a target that lies a horizontal distance of 1.27 mm from the point where protons are launched..
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