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1. A parallel plate capacitor has a charge of 0.020 pC on each plate with a potenctial difference of 240 V. the parallel plates are separated by 0.40 mm of air. What energy is stored in this capacitor?
2. A parallel plate capacitor has a capacitance of 1.20 nF. There is a charge of 0.80 pC on each plate. How much work must be done by an external agent to double the plate separation while keeping the charge constant?
transcranial magnetic stimulation tms is a noninvasive technique used to stimulate regions of the human brain. a small
A bullet having a velocity of 680 m/s hits a target 510 m away. If the speed of sound is 340 m/s, how soon after the bullet hits the target does the sound of the shot reach the target ?
A car drives straight off the edge of a cliff that is 60 m high. The police at the scene of the accident observed that the point of impact is 134 m from the base of the cliff. How fast was the car traveling while it went over the cliff.
A cosmic-ray proton in interstellar space has an energy of 17.0 MeV and executes a circular orbit having a radius equal to that of Jupiter's orbit around the Sun (7.78 x 10^11 m). What is the magnetic field in that region of space.
A very old specimen of wood contains 10^12 atoms of carbon: How many C-14 atoms did it contain in the year of 9474 B.C.?
Inductors in parallel. Two inductors L1 = 1.34 H and L2 = 2.20 H are connected in parallel and separated by a large distance so that the magnetic field of one cannot affect the other. Calculate the equivalent inductance
You use your 8x binoculars to focus on a yellow-rumped warbler (length 10cm) in a tree 14m away from you. What angle (in degrees) does the image of the warbler subtend on your retina
A wheel with radius 43.9 cm rotates 4.27 times every second. Find the period of this motion.
q1. boat a negotiates a curve whose radius is 352 m. boat b negotiates a curve whose radius is 160 m. each boat
A parachutist relies on air resistance (mainly on her parachute) to decrease her downward velocity. Calculate the net force on the parachutist
A small object with momentum 5.0 kg m/s approaches head-on a large object at rest. Find the magnitude of the large object momentum change
A standing wave is oscillating at 140 Hz on a string, as shown in the figure. What is the speed of traveling waves on this string
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