Electrons in a particle beam each have a kinetic energy of 4.0 × 10^?17 J. What is the magnitude of the electric field that will stop these electrons in a distance of 0.3 m? (e = 1.6 × 10^?19 C)
a. 1.9E+3 N/C
b. 7.5E+3 N/C
c. 8.3E+2 N/C
d. 1.3E+3 N/C
e. 6.3E+3 N/C
c
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A. Astigmatism |
B. Eye Dominance |
C. Focus |
D. Blind Spot |
E. Color Blindness |
F. Afterimages |
Stage 4 of star formation is when the object can exhibit violent surface activity producing extremely strong protostellar winds. This phase is also called the:
A) protostar phase. B) Herbig-Haro phase. C) brown dwarf phase. D) T Tauri phase. E) protoplanetary nebula phase.
The process by which raindrops are formed by the collision of droplets is called
a. the Bergeron process. b. fusion. c. fission. d. coalescence.
If we compress the entire history of the universe into one year, modern humans evolved
A) at 9 PM on New Year's Eve B) at midnight on New Year's Eve C) a couple of minutes before midnight on New Year's Eve D) a few seconds before midnight on New Year's Eve