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A capacitor is made of two parallel plates whose areas are 0.4 m2. Initially the distance between the plates is 2.3 cm, and the capacitor is connected to a 2.5 Volt battery. The capacitor is disconnected from the battery. Then the distance between its plates is changed to 1.9 cm. After this the capacitor plates are connected to another battery, which supplies 7.0 Volts.
What amount of charge flows from the capacitor to the new battery when they are connected?
A beam of protons at an accelerator creates a current of 120 mu/A. If the beam is focused on a target, how many protons strike the target in 30.0 s
When the space between two parallel plates is devoid of matter, the capacitance is .47 micro farrads. The dielectric constant is
q1. a 362 g object is attached to a spring and executes simple harmonic motion with the period of 0.200 s. if the total
A bouncy ball of mass 81 g is thrown straight into a wall at the speed of 23 m/s. What is the impulse applied to the ball by the collision
A thin, light wire is wrapped around the rim of a wheel, as shown in the following figure. The wheel rotates without friction about a stationary horizontal axis that passes through the center of the wheel.
A certain resistor is made with a 53.0 mlength of fine copper wire, 4.76*10-2 mm in diameter, wound onto acylindrical form and having a fiber insulator separating the coils. Calculate the resistance. (The resistivity of copper is1.72*10-8 Ω-m.)
In hot-air ballooning, a large balloon is filled with air heated by a gas burner at the bottom. Why must the air be heated
The reading taken on a sailing ship shows that on December 21, the noonday Sun has an altitude of 86½° to the south, and the marine chronometer reads 7 A.M. What are the latitude and longitude of the ship, and where is it located geographically?
You "throw together" 37 protons, 48 neutrons, and 37 electrons, to make a hypothetical atom of mass 84.960840 amu. (Utilize my number; don't look up the atom in a table of isotopes.) What is its binding energy in MeV/nucleon?
A female orb spider has a mass of 0.45g . She is suspended from a tree branch by a 1.0m length of 0.0020-mm-diameter silk. If you tap the branch and send a vibration down the thread, how long does it take to reach the spider
A cat stands facing a converging lens with its tail in theair. Under what circumstances (if any) would the image of thenose be virtual and the image of the tail be real
A 5.1 g marble is fired vertically upwardusing a spring gun. The spring must be compressed 8.0 cm if themarble is to just reach a target 13 mabove the marble's position on the compressed spring.
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