A particle (mass = 5.0 g, charge = 40 mC) moves in a region of space where the electric field is uniform and is given by Ex = 2.5 N/C, Ey = Ez = 0 . If the velocity of the particle at t = 0 is given by vy = 50 m/s, vx = vz = 0, what is the speed of the particle at t = 2.0 s?
a. 81 m/s
b. 72 m/s
c. 64 m/s
d. 89 m/s
e. 25 m/s
C
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An astronomer named _______________ used globular clusters to locate the center of the galaxy. (enter last name only)
Fill in the blank(s) with correct word
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An electron is accelerated from rest through a potential difference of 1.02 MeV. If the rest energy of the electron is 0.51 MeV, how fast is the electron moving?
A. 0.57 c B. 0.30 c C. 0.67 c D. 0.90 c E. 0.94 c