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Three equal point charges each with charge 1.45 μC are placed at the vertices of an equilateral triangle whose sides are of length 0.400m. What is the electric potential energy of the system. Take as zero the potential energy of the 3 charges when they are inifinitely far apart.
A stone is thrown vertically upward. On its way up it passes point A with speed v, and point B, 4.84 m higher than A, with speed v. calculate the maximum height reached by the stone
A spiral staircase winds up to the top of a tower in an old castle. To measure the height of the tower, a rope is attached to the top of the tower and hung down the center of the staircase. What is the height of the tower
It is then projected up the same plane with an initial speed 4.40 m/s. Explain how far up the incline will the block move before coming to rest?
Canadian nuclear reactors use heavy watermoderators in which elastic collisions occur between the neutrons and deuterons of mass2.0 u. What is the speed of a neutron, expressed as a fraction of its original speed, after a head-on
A double-decker bus is traveling at 10 m/s. A child in the bus throws a ball horizontally out of the window from a height of 5 m above ground level, with a velocity of 5 m/s in the direction perpendicular to the side of the bus. With what speed does ..
A particle travels horizontally between two parallel walls separated by 18.4 m. It moves toward the opposing wall at a constant rate of 7.7 m/s. What will be its speed when it hits the opposing wall
Originally, light is unpolarized. It then travels through 3 polarizers: the first with its transmission axis aligned vertical, the next at a 30 degree angle to the vertical and the last aligned at a 45 degree angle to the vertical (tilted the same..
If the entrance velocity into the pipe is 12.5 m/s, what is the rate of flow of the material (air) 'Rm'? What is the velocity 'Vf' when the air is ejected into the surroundings at 1 atm through a nozzle
Which of the following devices uses total internal reflection function?
Suppose a star with radius 8.39 multiply.gif 108 m has a peak wavelength of 686 nm in the spectrum of its emitted radiation. compute the surface temperature of the star
A nurse measures the temperature of a patient to be 37.8°C. What is this temperature on the Fahrenheit scale
Consider a circuit with a main wire that branches into twoother wires. If the current is 10 amperes in the main wire and 4amperes in one of the branches, how much current is in the other branch
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