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A parallel-plate capacitor has an area of 0.12 m^2 and a separation of 1.2 cm. A battery charges the plates to a potential difference of 120V and is then disconnected. A dielectric slab of thickness 4.0 mm and dielectric constant 4.8 is then placed symmetrically between the plates. (a) What is the capacitance before the slab is inserted. (b) What is the capacitance with the slab in place? (c) With the slab in place, what is the potential difference across the plates?(d) How much external work is involved in inserting the slab?
An oil drop whose mass is determined to be 3.3x10^-15 is held at rest between two large plates separated by 1cm while the potential difference between them is 340 V. How numerous excess electrons does this have here.
You construct two wire-frame cubes, one using (infinitely thin) copper wire, the other using (infinitely thin) aluminium wire. Find the difference in volume between the cubes
Two spaceships approach Mars from the same direction. One has a speed of 0.2c, What is the speed of one spaceship relative to the other
A hot-air balloon is rising upward with a constant speed of 2.68 m/s. When the balloon is 5.62 m above the ground, How much time elapses before the compass hits the ground
Science is about collecting data. What kind of data do you think you will collect in Physics 320 class? What kind of data will you collect about heat
A rocket blasts off vertically from rest on the launch pad with an upward acceleration of 2.30. At 10.0 after blastoff, the engines suddenly fail, which means that force they produce instantly stops.
A 10.0 kg ball rests suspended by the 5.0 m long weightless string. find The maximum deflection angle for the large ball
(a) Calculate the number of electrons in a small, electrically neutral silver pin that has a mass of 12.0 g. Silver has 47 electrons per atom, and its molar mass is 107.87 g/mole. (b) Imagine adding electrons to the pin until the negative charge h..
In a Young's double-slit experiment, two rays of monochromatic light emerge from the slits and meet at a point on a distant screen, What is the wavelength (in nm) of the monochromatic light
A sample of dry air has a temperature of 300 K, a volume of 3 liters and a pressure of 4 atmospheres. The air then undergoes the following changes: (a) it is warmed under a constant pressure to 500 K, (b) it is cooled under constant volume to 250 ..
A speed ramp at an airport is basically a large conveyor belt on which you can stand and be moved along. What is the speed at which the belt of the ramp is moving
The threshold intensity for a human eye to sense the presence of light is 50 photons falling on the retina within a period of 0.1 s. Estimate how far away the star can be away
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