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A 2.70 µF capacitor is charged by a 20.0 V battery. It is disconnected from the battery and then connected to an uncharged 4.14 µF capacitor. Determine the total stored energy at the following points in time.
(a) before the two capacitors are connected
(b) after they are connected
c) What is the change in energy?
A wire is moving perpendicularly through a magnetic field of strength 0.100 T with speed 60.0 m/s. what is the length of the wire
The outside mirror on the passenger side of a car is convex and hasa focal length of -7.6 m. Relative to thismirror, a truck traveling in the rear has an object distance of 16 m.
The angle of refraction of a ray of light traveling through a piece of fused glass quartz is 41°. Find the angle of incidence
A resting bat sends out ultrasonic waves at 50 kHz towards an insect that is approaching the bat with a speed of 20.0 m/s. What is the frequency of waves heard by the insect
In one dimension, an inertial ball of mass 1 kg has a speed of 1.50 m/s to the right and another inertial ball of mass 3 kg has a speed of 2.00 m/s to the left. Find the velocity of the center of mass after the collision
A dc motor is connected to a constant emf of 13.9 V. The resistance of its windings is 2.0 ?. What current does it draw at normal operating speed
A diffraction grating has 2604 lines per centimeter, and it produces a principal maximum at θ = 30.0 °. What are the wavelengths of the incident light that could have produced this maximum
How fast should the platform move, v_p, for the person to detect a beat frequency of 7.00 Hz ? Take the speed of sound to be 344 m/s. Express your answer numerically in meters per second.
A satellite has a mass of 99 kg and is located at 2.0 106 m above the surface of Earth. compute the potential energy associated with the satellite
How much charge can be placed on a capacitor with air between the plates before it breaks down if the area of each plate is 6.00 cm2
Two heavy pendula of mass m are suspended from strings of length l inside a railroad car of mass M that can roll freely on horizontal tracks (ignore the moment of inertia of the wheels).
When a proton (+1.6 x 10^-19 C) moves .10 m along the direction of an electric field of strength 3.0 N/C, what is the magnitude of the electrical potential difference between the protons initial and ending points
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