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Two identical conducting spheres, fixed in place, attract each other by an electrostatic force of -0.2848 N when separated by 50 cm, center-to-center. The spheres are then connected with a thin conducting wire. When the wire is removed, the spheres repel each other with an electrostatic force of 0.0608 N. What were the initial charges on the spheres? Since one is negative and you cannot tell which is positive or negative, there are two solutions. Take the absolute value of the charges and enter the smaller value here. Enter the larger value here
Finish the Hydrogen atom model we started in class (1 proton at center 1 electron at 59 pico-meter to the right of it)
1) Use the proton's E-field strength there (= 4E11 N/C) to find the Force applied to the electron
2) Use the electron's mass (0.911E-30 kg) to predict the electron's acceleration there (direction, too!)
3) Use the centripetal acceleration formula (?v²/r) to discover the electron's speed around the proton.
4) How long does that electron take to go all the way around the proton?
Mary and her younger brother Alex decide to ride the carousel at the State Fair. Mary sits on one of the horses in the outer section at a distance of 2.0 m from the center. What is Mary's angular speed M and tangential speed vM
A particular amplifying device supplies electrons in a manner such that the current passing out of the device, Determine the charge that passes out of the device if left on for 30 seconds
A 20cm length of 0.35mm diameter nichrome wire is welded into a circular loop. The loop is placed between the poles of an electromagnet, What is the induced current in the loop
Four masses M in deep space are connected by four identical light springs with spring constant k and equilibrium length L. What is the kinetic energy of this system
Calculate the energy of each of the two photons produced from electron-positron pair annihilation when the electron and positron were nearly at rest
What voltage is required to charge a parallel combination of the two capacitors to the equal total energy.
A coil consists of 212 turns of wire. Each turn is a square of side d = 18 cm, compute the magnitude of the induced emf in the coil
A plane drops a package of food to stranded caribou on an ice flow in the Arctic circle. How far short of the target should it drop the package
A circular wire loop of radius 19.1 cm carries a current of 3.62 A. What is the magnitude of the torque acting on the loop
The far point of a nearsighted person is 5.0m from her eyes, and she wears contacts that enable her to see distant objects clearly. A road sign is 20.0m away and 2.5m high, (a) When she looks through the contacts at the sign, what is its image distan..
A long, straight, thin-walled cylindrical shell of radius R carries a current I parallel to the central axis of the shell. Discover the magnetic field (including direction) both inside and outside the shell.
A rocket of mass 3.95 ×105 kilogram is in flight near earth's surface. Its thrust is directed at an angle of 65.7 degree above the horizontal and has a magnitude of 7.76 × 106 Newton. find what is the direction of the rockets acceleration
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