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Two small spheres spaced 35.0 apart have equal charge. How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 5.84×10?21?
You throw a stone upward from the top of a building at an angle of 25° to the horizontal, How far from the base of the building does the stone land
An plane and pilot have a total mass of 168 kg. While executing a banked curve of radius 20 m at a speed of 12 m/s
What is the final charge of each conductor. Two identical spherical conductors X and Y are mounted on insulated stands. X carries the charge of +8.0nC and Y carries a charge of -2.0nC.
Two lightbulbs operate on the same potential difference. Bulb A has four times the power output of bulb B. What is the ratio of the current in bulb A to the current in bulb B?
A playground Merry-Go-Round has a mass of 291 kg which can be viewed as being uniformly distributed over a disk of radius 2.4 m. What is the new rotation rate assuming the child remains at the rim
Two particles of masses m and 3.00m are moving toward each other along the x-axis with the same speed v. They undergo a head on elastic collision and rebound along the x- axis. Find out the final speed of the heavier object.
A ray of red light in air , 650nm, is incident on semicircular block of plastic n=1.51, Determine angle of reflection at first interface
A skier is gliding along at 3.0 m/s on horizontal, frictionless snow. He suddenly starts down a 10° incline. His speed at the bottom is 15 m/s. How long does it take him to reach the bottom
Suppose that an electron is trapped within a small region and the uncertainty in its position is 7.20 multiply.gif 10-15 m, find the minimum uncertainty in the electron's momentum
If the angle between wires supporting the street lamp is reduced to 110°, what is the tension in each wire.
At a certain location, the Earth's magnetic field has a magnitude of 5.8×10?5T, Find the magnitude of the magnetic flux through the top of a desk at this location that measures 140cm by 90
A trombone has an effective length of 160 cm and the speed of sound in air is 345 m/s. Notes are selected by moving a U-shaped tube in or out to change effective length of the trombone.
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