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An empty capacitor is connected to a 11.9-V battery and charged up. The capacitor is then disconnected from the battery, and a slab of dielectric material (κ = 2.2) is inserted between the plates. Find the magnitude of the amount by which the potential difference across the plates changes.
A 0.51T magnetic field is perpendicular to a circular loop of wire with 50 turns and a radius of 13cm, what is the magnitude of the induced emf
Suppose that a police car on the highway is moving to the right at 29 m/s, while a speeder is coming up from almost directly behind at a speed of 31 m/s, which wave has the greater frequency
A fan blade is revolving at 20 cycles/s when someone turns off the fan. How long will it take for the fan blade to come to rest
Calculate the electrical potential at the center of the square described as follows: Four charges are placed at the corners of a 20 cm square
A point charge of 8.40 mC is surrounded by an equipotential surface with a radius of 0.298 m. What is the electric potential on the surface
A bird, starting from its nest (we'll call that the origin), flies 24.0 km due southeast. It then changes directions and flies 26.0 km in a direction 60° north of east. Find the magnitude and direction of its resultant displacement.
A certain helium-neon laser pointer, emitting light with a wavelength of 632 nm, How many photons are emitted by the laser pointer
If Neville weighs 25 N and climbs a mountain and exerts 500 J of work, how far did Neville climb
Three lamps with resistances 1 ?, 2 ? and 3 ? are connected in series in a circuit with a voltage source of 12V. Calculate the voltage drop across each lamp
A hockey player uses her hockey stick to exert a force of 6.81 N on a stationary hockey puck. What is the acceleration of the hockey puck
A bicycle is turned upside down while its owner repairs a flat tire on the rear wheel. determine the magnitude of the average angular acceleration of the wheel
A wheel starts from rest and rotates about its axis with constant angular acceleration. What is the angular velocity when the time t = 6.7 s
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