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What is the power of a 110 MV lightning bolt having a current of 27,300 A?
How is electric power related to the voltage and the current?
A very large box of doughnuts weighs 122 N on earth. (a) What is its mass (kg) on earth? (b) What is its weight (N) on Jupiter where the free-fall acceleration is 25.9 m/s2? (c) What is its mass (kg) on Jupiter?
A wire of resistance 6.0 ohm is connected to a battery whose emf is 4.0 V and whose internal resistance is 1.0 ohm. Find how much energy is transferred from chemical to electrical form in 2.0 minute
If the driver of the car slams on the brakes, what is the minimum constant acceleration he must undergo to stop short of the moose and avert an accident?
Light of wavelength 800nm is incident on a metallic surface. if the stopping potential for the photo-electrons ejected from the metal is 0.35 volts, find the work function for the metal and the longest wavelength incident light that will eject photo-..
A wire 4.38m long and 6.00 mm in diameter has a resistance of 15.0mΩ. A potential difference of 28V is applied between the ends. What is the current in the wire? Calculate the resistivity of the wire material.
At what distance from the wire would the magnitude of the magnetic field equal to the strength of the Earth's magnetic field of 5.0 x 10^-5 T?
The primary coil of an ideal transformer has 650 turns, and the secondary coil has 260 turns. What is the output current of the secondary coil
A player bounces a 0.47 kg soccer ball off her head, changing the velocity of the ball from i = (9.2 m/s) + (-2.7 m/s) to f = (6.1 m/s) + (5.5 m/s). The ball is in contact with the player's head for 6.70ms.
the elastic energy stored in a stretched bungie cord is found to be 568 j. the the bungie cord is stretched 0.349 m
The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space.
To weigh a fish, a person hangs a tackle box of mass 3.5 kilogramsand a cooler of mass 5 kilograms from the ends of a uniform rigidpole that is suspended by a rope attached to its center. What is the mass of the fish
An unstable particle called the pion has a mean lifetime of 25 ns in its own rest frame. What is the mean lifetime of the pions as measured in the laboratory frame
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