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Regarding the Earth and a cloud layer 800m above the Earth as the“plates” of a capacitor, calculate the capacitance ifthe cloud layer has an area of 1.0 km2. If an electricfield of 2.0 x 106 N/C makes the air break down andconduct electricity (lightning), what is the maximum charge the cloud can hold?
A 90.6-kg climber is scaling the vertical wall of a mountain. His safety rope is made of a material that, How much is the rope stretched when it breaks his fall and momentarily brings him to rest
Dipole in a Field An electric dipole, consistingof charges of magnitude 4.40 nC separatedby 7.80 µm, is in an electric fieldof strength 1200 N/C. What is the magnitude of the electricdipole moment?
Mercury is about 13.6 times the density of the human body. Assume that a person (Weight = 150lb {one could only wish}) were totally immersed in the mercury; what would be the buoyant force experienced by that person?
A wire with initial length L0 and radius r0 has measured resistance of 1.0 ohms. The wire is drawn under tensile stress to a new uniform radius of 0.25 r0. What is the new resistance of the wire
king arthurs knights fire a cannon from the top of the castle wall. the cannonball is fired at a speed of 42 ms and an
Two identical conducting small spheres are placed with their centers 0.395 m apart. Find the electric force exerted by one sphere on the other
A small spherical mass of 8.25 × 10-2 kg and charge of q2 = - 0.40 µC hangs from a thread. What is the tension in the thread
A sharp image is located 84.0 mm behind a 64.0 mm focal-length converging lens. Find the object distance using a ray diagram
A factory workeraccidentally releases a 175 kg cratethat was being held at rest at the top of a 3 m long ramp inclined at 38° to the horizontal. How far will it subsequently slide across the factory floor
Regarding the Earth and a cloud layer 700 m above the Earth as the "plates" of a capacitor, What is the maximum charge the cloud can hold
A light beam is incident on a piece of water (n = 1.333) at the Brewster's angle. Find the value of Brewster's angle
Two ice skaters, with masses of 30.0kg and 65.0kg , are at the center of a 60.0m -diameter circular rink. If the heavier skater reaches the edge in 40.0s , how long does the lighter skater take to reach the edge
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