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Paper has a dielectric constant K=3.7 and a dielectric strength of 15*10^6 V/m. Suppose that a typical sheet of paper has a thickness of .11mm. You make a "homemade" capacitor by placing a sheet of 21*14 cm paper between two aluminum foil sheets of the same size.
(a) What is the capacitance C of your device?
(b) About how much charge could you store on your capacitor before it would break down?
A ski gondola is connected to the top of a hill by a steel cable of length 620 and diameter 1.7. What is the speed of the pulse
when light with a wavelength of 545 shines on a metal surface electrons are ejected with speeds of 3.1 x 105 ms or
The net force acting on an object constrained to the x axis is given by Fx(x) = x3 - 4x. (the force is in newtons and xin meters). Locate the positions of unstable and stable equilibrium. Show that each position is stable or unstable by calculating t..
A billiard ball rolling across a table at 1.75 m/s makes a head-on elastic collision with an identical ball. (a) Find the speed of each ball after the collision when the second ball is initially at rest.
A wheel is mounted on a stationary axle, which is nearly frictionless so that the wheel turns freely. The wheel has an inner ring with mass 5 kg, how much work do you do
Standing on a sidewalk, you notice that you are halfway between a clock tower and a large building. When the clock strikes the hour, you hear an echo of the bell 0.8 s after hearing it directly from the tower. How far apart are the clock tower and th..
Two parallel, very long straight wires separated by 10 centimeter are carrying 2.0 Amp and 4.0 Amp in the same direction. Obtain the magnetic field at points midway between the wires
a large point charge of q 50 microc creates an electric field and an electric potential all around it. a styrofoam
Shaving/makeup mirrors typically have one flat and one concave (magnifying) surface. You find that you can project a magnified image of a light bulb onto the wall of your bathroom, What is the focal length of the mirror
A ray of light is incident on the mid-point of a glass prism surface at an angle of 25.0º with the normal. What is the angle of refraction as the ray enters the air on the far side of the prism
The pressure in an automobile tire is usually quoted (in the United States) in pounds per square inch (lb/in2), What is the value of the gauge pressure in Pascals
A piece of glass has a temperature of 73.0 °C. Liquid that has a temperature of 37.0 °C is poured over the glass, determine the specific heat capacity of the liquid
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