Physics, 28.10.2019 22:31 nautiannaharper5891
What do the positive helium ions do for the e / m apparatus? choose the most complete, best answer.
a. they are there only when the electrons are not orbiting, otherwise, they move to the outer edge of the bulb.
b. they are there so that the bulb does not implode.
c. they emit photons which allow the beam to be seen.
d. they get hot and glow.
e. they focus the electron beam.
f. they focus the electron beam and they emit photons which allow the beam to be seen.
2. when is a charge acted upon by a magnetic force?
Answers: 1
Physics, 22.06.2019 12:10
Ablock having mass m slides down an inclined plane. the force of friction between the block and the inclined plane is f, the block's weight is m g, and the normal force is n. (a) draw a free – body force diagram showing the forces acting on the block. (b) write down all relevant newton’s equations for a given situation.
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Physics, 22.06.2019 23:50
An alpha particle with kinetic energy 12.5 mev makes a collision with lead nucleus, but it is not "aimed" at the center of the lead nucleus, and has an initial nonzero angular momentum (with respect to the stationary lead nucleus) of magnitude l = p0 b, where p0 is the magnitude of the initial momentum of the alpha particle and b=1.40×10−12 m. (assume that the lead nucleus remains stationary and that it may be treated as a point charge. the atomic number of lead is 82. the alpha particle is a helium nucleus, with atomic number 2.) what is the distance of closest approach?
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Physics, 23.06.2019 05:00
City b is south of city a, and the 200 mile trip by car takes 4 hours. the cities are 120 miles apart in a straight line. what is the velocity of a trip from city a to city b?
Answers: 2
Physics, 23.06.2019 08:30
If we compare the force of gravity to strong nuclear force, we could conclude that
Answers: 1
What do the positive helium ions do for the e / m apparatus? choose the most complete, best answer....
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