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a) Calculate the force on a dielectric slab inserted partly into a parallel plate capacitor with plate dimensions L and w, with a length x of the dielectric lying between the plates. Assume that the plates are isolated, so the charge ±Q on the plates is constant.
b) Now suppose the capacitor stays connected to a battery so the potential difference V stays fixed. Calculate the force on the slab for this case, and compare to the result obtained for isolated plates.
If a metric ton is 1 x10^3 kg, how many 88 kg people can safely occupy an elevator that can hold a maximum mass of exactly 1 metric ton.
Examining your image in a convex mirror whose radius of curvature is 24.8cm , you stand with the tip of your nose 10.2cm from the surface of the mirror. Where is the image of your nose located
A gun shoots small plastic balls. The ball falls 1.2 m while traveling horizontally 5.1 m. Calculate the speed the ball leaves the gun
A space station is constructed in the shape of a wheel 25 in diameter, with essentially all of its 5.10×10^5 mass at the rim.
Sam, whose mass is 74kg , straps on his skis and starts down a 44m -high, 20? frictionless slope. Use work and energy to find Sam's speed at the bottom
How much energy is transferred to the water as heat
The resistance of a 100-cm wire of cross sectional area 2 × 10-6 m2 is 400 ?. What is the resistivity of the material of this wire
You have a small electromagnet that consumes 320 W from a residential circuit delivering 115 V at 50.0 Hz. What is the internal resistance of the electromagnet
A transmission line that has a resistance of 0.5 omh per km of length is used to transmit 200 MW across 300 miles. what should be the transmission voltage
A ball is tossed from an upper-story window of a building. The ball is given an initial velocity of 9.00 m/s at an angle of 20.0° below the horizontal. Find the height from which the ball was thrown
A nuclear power plant generates 2000 MW of heat energy from nuclear reactions in the reactor's core. What is the plant's actual efficiency
At what angle should a curve of radius 155m be banked, so cars can travel safely at 26m/s without relying on friction.
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