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Darla charges a parallel plate capacitor with the help of a battery. She than removes the battery and halves the distance between the two plates. (1) What happens to the capacitance and voltage of the capacitor? (2) Derive and explain why halving the distance between the plates of a disconnected, charged capacitor reduces the stored energy by half?
Using the inductance found in the previous problem, what is the impedance seen by the voltage source
A lunch tray is being held in one hand, as the figure illustrates. The mass of the tray itself is 0.214 kg, and its center of gravity is located at its geometrical center. Obtain the force exerted by the thumb
A 0.55 kg book moves vertically upwarda distance of 10 m, and thenvertically downward 10 m, returning toits initial position. How much work is done by gravity during the upwardmotion of the book
A wire is moving perpendicularly through a magnetic field of strength 0.100 T with speed 60.0 m/s. If the potential difference between the ends of the wire is 2.00 V, what is the length of the wire?
if a tune LC circuit has a capacitance of 7. 10^-2 pF and an inductor of 100 uH, what is its natural frequency
A student at another university repeats the experiment you did in lab. What is the kinetic energy (in joules) of the target ball just after it is struck
what is the rms current in an rl circuit when a 50.0hz 240v rms ac voltage is applied where r 1.50 and l 520mh ? what
Determine the location at which the tuning is formed and the vibrating frequency of a string to form a standing wave pattern.
the size of the hydrogen atom grows in proportion to n2 where n is the principal quantum number. for the atom in the n
A thin rod of length 9.5 m and mass 16 kg is supported at a 28? incline. Find the normal force exerted on the rod by the lower support
Suppose a 436 kg alligator of length 3.8 m is stretched out on a board of the same length weighing 95 N. find the x-component of the alligator's center of gravity
The locomotive is moving at 25 km/h. The engineer of the high speed train immediately applies the brakes. What must be the magnitude of the resulting constant deceleration if a collision is to be just avoided.
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