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Lightning As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and a cloud at an altitude of 470m to be the other plate. Assume the surface area of the cloud to be the same as the area of a square that is 0.80km on a side. (Dielectric strength of air is 3.0 \times 10^6 \; \rm V/m)
What is the capacitance of this capacitor?
How much charge can the cloud hold before the dielectric strength of the air is exceeded and a spark (lightning) results?
Valerie is able to do 1200 joules of work in 10seconds. Brett is able to do 5000 joules of work in 50 seconds. Who is more powerful.
A basketball player jumps straight up and then lands 0.49 seconds after leaving the ground. Find the initial velocity of the player
A 2.68 mol sample of an ideal monatomic gas undergoes the reversible process shown in the figure. calculate How much work is done by the gas
Suppose that you wish to mold a uniform wire from 1.50 g of copper. The wire needs to have a resistance of 0.0400 ohm's, What should be the diameter fo the wire?
A 16-kg rotating disk of radius 0.26m has an angular momentum of 0.30KGg * m^2/s, What is the angular speed of the disk
The change in specific enthalpy during the melting of ice at 0 degrees C and 1.01 X 10^5 Pa is ?h= 333.39 kj/kg. find the change in entropy of reservoir and universe
Two tanks are engaged in a training exercise on level ground. The first tank fires a paint-filled training round with a muzzle speed of 240m/s at an angle 13.4, Find the distance between the tanks when the round was first fired
When a charge with q=2e moves under the influence of the electric force and an external force through a potential difference of -80V, The work done by the external force is
In a fast-pitch softball game the pitcher is impressive to watch, Determine the angle of the total acceleration relative to the radial direction
A ferry transports tourists among three islands. It sails from the first island to the second island, 5.41 km away, Calculate the distance between the first and third islands
Whats the coefficient of the kinetic friction of the tire. What is the acceleration of the car.
A luge (sled) and its rider, with a total mass of 85 kg, emerge from a downhill track onto a horizontal straight track with an initial speed of 37 m/s, What distance do they travel while decelerating
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