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The dielectric in a capacitor serves two purposes. It increases the capacitance, compared to an otherwise identical capacitor with an air gap, and it increases the maximum potential difference the capacitor can support. If the electric field in a material is sufficiently strong, the material will suddenly become able to conduct, creating a spark. The critical field strength, at which breakdown occurs, is 3.0 MV/m for air, but 60 MV/m for Teflon.
A parallel-plate capacitor consists of two square plates 13cm on a side, spaced 0.60mm apart with only air between them. What is the maximum energy that can be stored by the capacitor?
What is the maximum energy that can be stored if the plates are separated by a 0.60-mm-thick Teflon sheet?
At an amusement park there is a ride in which cylindrically shapedchambers spin around a central axis. People sit in seats facing the axis, their backs against the outer wall. At one instant the outerwall moves at a speed of 3.5 m/s, and an83 kg pers..
If the final equilibrium temperature is 30oC and no heat is lost to the cup itself or the environment, what is the mass of the aluminum spoon?
(a) Calculate the relativistic quantity γ = for 1.00 TeV protons produced at Fermilab. Correct: Your answer is correct. (b) If such a proton created a π+ having the same speed, how long would its life be in the laboratory? Correct: Your answer is cor..
A ball rolls off an incline at a velocity of 22m/s. The angle of the incline is 32 degree and the height of the incline from the floor is 9meter. Calculate how far the ball will the ball land
200 Ω, 0.5 mA galvanometers are used for making a 20 Amp ammeter and a 120 Volt voltmeter. Determine resistance of the corresponding shunts
A 1970-kg car is moving down a road with a slope of 14% while speeding up at a rate of 3m/s^2. What is the direction and magnitude of the frictional force
A rocket moves upward from rest with an acceleration of 29.4 m/s2 for 4 seconds. It then runs out of fuel and continues to move upward. Neglecting any air resistance, how high will it rise?
A rifle of 3.0 kg is fired. The velocity of a 10-gbullet at the muzzle is 300 m/s. It takes 0.005 s for the bullet to reach the muzzle. Discover a) the average force acting on the bullet; b) the recoil velocity of the rifle.
Assume the coefficient of static friction between the tires and the road on a Formula One car is 0.9 during a Grand Prix auto race. Find what speed will put the car on the verge of sliding
Four point charges have the same magnitude of 2.4 x10-12C and are fixed to the corners of a square that is4.0 cm on a side. Three of the charges are positive and one isnegative. Determine the magnitude of the net electric field that exists at the ..
A particular engine has a power output of 4.00 kW and an efficiency of 23.0%. Assume the engine expels 7000 J of energy in each cycle. Find the energy absorbed in each cycle
A 4.9 kg block is initially at rest on a horizontal frictionlesssurface when a horizontal force in the positive direction ofan x axis is applied to the block. The force isgiven by (x) = (2.8- x2) N, where x is inmeters and the initial position of ..
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