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Question: How many excess electrons must be added to one plate and removed from the other to give a 5.00nF parallel-plate capacitor 25.0J of stored energy?
How could you modify distance between the plates of this capacitor to get it to store 50.0J of energy without changing the charge on its plates.
Object is hung from a spring balance attached to the ceiling of an elevator. The balance reads 56 n when the elevator is standing still. What is the reading when the elevator is moving downward with a constant speed of 6.4 m/s?
If I put 40g of ice at 0°C into a perfectly insulated cup containing 250g of coffee at 90°C, what will the final temperature be when the system comes into thermal equilibrium? Suppose that the specific heat of coffee is the same as that of water.
Name the two methods that will produce a spectrum from white light. Compare the methods based on.
A circular loop in the plane of a paper lies in a 0.85 T magnetic field pointing into the paper. The loop's diameter changes from 20.5 cm t0 5.6 cm in 0.55 s, What is the magnitude of the average induced emf
An x-ray with wavelength .18 nm is emitted when an L shell electron makes a transition to the K shell. What is the atomic number of the atom
Two radio antennas are 140 meter apart on a north-south line. Find at which destructive interference of the two radio waves occurs
You are driving home from school steadily at 95 km/h for 130 km. Itthen beins to rain and you slow to 65 km/h. how far is your hometown from school
ccccthe Zambesi river in Africa rushes over Victoria Falls at a rate of 25 x 10^6 gallons per minute. The falls are 108 m high, 1 gallon equals 3.785 x 10^-3 m^3 (or 0.1337 cubic foot), and the water has a density of 1.00 x 10^3 kg/m3 (each cubic foo..
In an X-ray scattering measurement the first order diffraction peak is observed at ? = 16.5°. What is the angle of the third order peak
A 1000kg elevator is being lifted vertically upward by a strong cable. What is the acceleration of the elevator
A 3600-Ω resistor and a 1.1-µF capacitor are connected in series acrossa generator (60.0 Hz, 120 V rms). Determine the average powerdelivered to the circuit.
A hockey player is standing on his skates on a frozen pond when an opposing player, moving with a uniform speed of 15 m/s, skates by with the puck. How far has he traveled in that time
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