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The potential difference between a storm cloudand the ground is 100 million volts. If a charge of 2 coulombsflashes in a bolt from cloud to Earth, what is the change of potential energy of the charge?
A simple pendulum with a period T = 2.00 s is attached to the ceiling of an elevator which is initially at rest, Calculate the period of oscillations when the elevator accelerates downwards
An object of mass m moves to the right with a speed v. It collides head-on with an object of mass 3m moving with speed v/3 in the opposite direction. what is the speed of the combined object
You're driving down the highway late one night at 18 when a deer steps onto the road 36 in front of you. The reaction time before stepping on the brakes is 0.50, and the maximum deceleration of your car is 12.
A projectile is fired with an initial speed of 65.2 m at an angle of 34.5? above the horizontal on a long flat firing range. find The maximum height reached by the projectile
Two charges are placed on the x axis. One of thecharges (q1 = +5.89C) is at x1 = +3.00 cm and the other(q2 = -27.0C) is at x2 = +9.00 cm. Find the netelectric field (magnitude and direction given as a plus or minussign) at (a) x = 0 cm and(b) x = +6...
In the "before" part of the figure below, car A (mass 1000 kg) is stopped at a traffic light when it is rear-ended by car B (mass 1600 kg). Both cars then slide with locked wheels until the frictional force from the slick road (with a low µk of 0...
An airplane is cruising along in a horizontal level flight at a constant velocity, heading due west. If the weight of the plane is 2.6´104 N, what is the net force on the plane
A 7.70cm length of straight wire runs horizontally along a north-south line. Find the magnitude of the magnetic force on the wire
q1. a 40 cm diameter vertical cylinder is sealed at the top by a frictionless 22 kg piston. the piston is 79 cm above
Lightening produces a maximum air temperature around 3 x 10 ^4 K. Using Wien's Law, find the wavelength of the thermally produced photons
A tortoise can run with a speed of 14.0 cm/s, and a hare can run 20 times as fast. In a race, What is the length of the race
A speck of dust on a spinning DVD has a centripetal acceleration of 20 m/s^2. A) What is the acceleration of a different speck of dust that is twice as far from the center of the disk? B) What would be the acceleration of the first speck of dust if t..
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