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Identical point charges of +1.6 ?C are fixed to diagonally opposite corners of a square. A third charge is then fixed at the center of the square, such that it causes the potentials at the empty corners to change signs without changing magnitudes. Find the sign and magnitude of the third charge.
When pulling a mass hanging from a spring at a constant rate down then releasing it so it bobs up and down, what is its maximum amount of kinetic energy
What is the magnetic field strength
In the Bohr model of hydrogen, the electron moves in a circular orbit around the nucleus. Determine the angular speed of the electron
A meter stick balances horizontally on a knife-edge at the 50.0 cm mark. With two 5.00 g coins stacked over the 6.0 cm mark, What is the mass of the meter stick
A square loop of wire with dimensions L x L lies in the xy plane, moving along the x direction with a speed v. Find the induced emf as the loop moves from one region to the next
An air-track glider attached to a spring oscillates between the 16.31 cm mark and the 51.41 cm mark on the track. What is the maximum speed of the glider
Assuming the train has an average speed during a trip from the train stop to the airport of 250[km=hr], how long will it take to make the trip [minutes]. Assuming the train can accelerate to its fastest speed in 5[s]
When rebuilding her car's engine, a physics major must exert 450 N of force to insert a dry steel piston into a steel cylinder at a constant velocity. What is the normal force between the piston and cylinder
Sean climbs a tower that is 84.7 m high to make a jump with a parachute. what is the potential energy of Sean
What is the acceleration of a ball traveling horizontally with an initial velocity of 20 meters/second and, 2.0 seconds later, a velocity of 30 meters/second? A. 1.6 m/s^2 B. 3.0 m/s^2 C. 3.4 m/s^2 D. 5.0 m/s^2
Find the probability that the electron will tunnel through the barrier.
An audio amplifier provides an alternating rms potential difference of 15.0V. A loudspeaker connected to the amplifier has a resistance of 10.4 ohm. what is the rms current in the speaker
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