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A 2.0-nF parallel plate capacitor with a sheet of mylar (k = 3.1) filling the space between the plates is connected to a 90 V battery. While it is still connected to the battery, the sheet of mylar is completely removed from the space between the two plates. Determine the change in the charge on one of the plates.
A bus contains a 1440 kg flywheel ( a disk that has a 0.670 m radius ) and has a total mass of 9400 kg. Calculate the angular velocity of the flywheel
Two steel wires of the same length, one with radius r and the other with radius 4r, are connected together, end to end, and tied to a wall. How far does the point where the two wires meet move
What is the longest wavelength of light that can be absorbed by a hydrogen atom that is initially in the first excited state
What is the mass of water before the hot iron is put into the cup? How much energy is required to melt all of the ice, How much energy leaves the iron in the form of heat
A street lamp weighs 180 N. It is supported by two wires that form an angle of 150° with each other. The tensions in the wires are equal.
In a vacuum, two particles have charges of q1 and q2, where q1 = +3.66 ?C. They are separated by a distance of 0.213 m,
If 600 j of heat are added to 50 g of water initially at 20 degrees C. What is the final temperature of the water
a motor starts from rest with an angular acceleration of 12. rad/s ^2 what is the motor angular speed 4.0s later? how many revolutions does it make in this period of time
If the piston has a cross sectional area of 0.0100 m^2 and negligible mass, how high would it rise when the temperature is raised to 250°C.
Consider a spring handing vertically from a ceiling, attached to a mass m of 2 kg. The spring constant, k, is 30 N/m. How far does the spring travel downwards before it reverses direction
Yellow-green light(wavelength 550nm) passes through two closely spaced very narrow slits, what is the wavelength for that second source of light.
steam at 18mpa and 600 c is contained in a cylinder of volume 0.5m3 , calculate the heat rejected by the steam
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