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There are three masses arranged on the vertexes of an equilateral triangle with side L. Each of these masses has a charge Q. When released, these masses move off to infinity. Assuming an equal distribution of energy and equal masses m, what is the speed of each mass at infinity.
A small block with mass m1 rest on a frictionless horizontal tabletop a distance r1 from a hole in the center of the table. A light, stretchless string tied to the small block passes down through the hole, and a larger block with mass m2 is suspen..
an car mass 1000kg is traveling east30m/s . it is hit by another car 2000kg whick was travelingnorthwest at 20m/s.the two cars stick together. what is the velocity of the cars after they stick together
Explain two methods to make grapheme and explain two methods to make quantum dots?
A special electronic sensor is embedded in the seat of a car that takes riders around a circular loop-the-loop ride at an amusement park. What is the speed of the rider at the top of the loop
An electron enters a region of space containing a uniform 0.0000199-T magnetic field. Its speed is 199 m/s and it enters perpendicularly to the field. Find the radius of the electron's orbit
Four point charges have the same magnitude of 2.53 x 10^-12 C and are fixed to the corners of a square that is 4.15 cm on a side. Three of the charges are positive and one is negative. Determine the magnitude of the net electric field that exists ..
a proton moving at a constant velocity of 106 ms enters a region of uniform magnetic field perpendicular to its
A commonly used method of fastening one part to another part is called "shrink fitting." A steel rod has a diameter of 2.0053 cm, By how many Celsius degrees should the rod be cooled
An extreme skier, starting from rest, coasts down a mountain slope that makes an angle of 25.0o with the horizontal. How fast is she going just before she lands
An electron is a hydrogen atom drops from the n=6 state to the ground state. What is the frequency of the photon that is emitted
the number of radioactive nuclei present at the state of an experiment is 2.78e15. the number present twenty days later is 5.14e14. what is the half life in days of the nuclei
q1. an ocean liner leaves new york city and travels 37.0deg north of east for 171 km. how far east and how far north
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