Physics, 24.10.2019 17:43, marisa2278
It is not possible to see very small objects, such as viruses, using an ordinary light microscope. an electron microscope can view such objects using an electron beam instead of a light beam. electron microscopy has proved invaluable for investigations of viruses, cell membranes and subcellular structures, bacterial surfaces, visual receptors, chloroplasts, and the contractile properties of muscles. the "lenses" of an electron microscope consist of electric and magnetic fields that control the electron beam. as an example of the manipulation of an electron beam, consider an electron traveling away from the origin along the x axis in the xy plane with initial velocity . as it passes through the region x = 0 to x = d, the electron experiences acceleration , where ax and ay are constants. for the case vi = 1.90 ? 107 m/s, ax = 8.57 ? 1014 m/s², and ay = 1.47 ? 1015 m/s², determine the following, at x = d = 0.0100 m.
(a) the position of the electron
yf = m
(b) the velocity of the electron
(c) the speed of the electron
|vf| = m/s
(d) the direction of travel of the electron (i. e. the angle between its velocity and the x axis)
θ =
Answers: 2
Physics, 22.06.2019 11:00, ronniethefun
If a simple machine reduces the strength of a force, what must be increased?
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Physics, 22.06.2019 14:20, jadahilbun01
A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.
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It is not possible to see very small objects, such as viruses, using an ordinary light microscope. a...
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