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In 1897, English physicist J.J. Thomson "discovered" the electron with a very elegant and relatively simple experiment. Consider shooting a beam of electrons at a constant speed through a region of uniform electric and magnetic fields and , respectively. The directions of , and are all perpendicular to one another.
a) What direction(s) should the two fields point in so that the two forces on the electrons (magnetic and electric) counteract one another? b) Imagine the scenario in which the and fields have been tuned so that the net force on the electrons is zero. What is the speed of the electrons? c) If you now turn off the electric field, what happens to the particles? What is the charge-to-mass ratio (/) of an electron (in terms of the above variables)?
(a)Calculate the altitude ( height above the Earth's surface) of a satellite which is in geosynchronous orbit around the earth's equator ( this means that it orbits the Earth once per day , thereby always staying above the same location on the surfac..
Two small charged balls have a repulsive force of 0.10N when they are separated with a distance of 0.50m. The balls are moved closer together, until the repulsive force is 0.50N. How far apart are they now?
The maximum safe current in 12 gauge (0.21 centimeter diameter) silver wire is 22 Amp. Find what is the electric field under these conditions
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Superman meets an asteroid in outer space and hurls it at 90m/s. The asteroid is five hundred times more massive than Superman is. In the strip, Superman is seen at rest after throw. Taking physics into account, what would be his recoil speed.
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