Protons have a mass
A. equal to the mass of the electron
B. 1835 times smaller than the mass of the
electron
C. 1835 times larger than the mass of the
electron
C. 1835 times larger than the mass of the
electron
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Triton, the largest of Neptune's moons has a retrograde rotation. This means that it revolves about Neptune in the opposite direction to Neptune's direction of rotation about its own axis
The gravitational attraction of Triton causes tides on Neptune, which gradually slow down its rotation about its own axis. What consequences does this have for Triton?
An object in uniform circular motion has
a. constant acceleration. b. variable radial distances. c. constant velocity. d. constant speed.
Why do stars in the central bulge have a lower metallicity than stars in the disk?
What will be an ideal response?
An electron is briefly accelerated in the direction shown in the figure below and to the left. It creates an EM wave pulse that eventually reaches points P and S 
What is the direction of the wave’s motion at point P?
A. A B. B C. C D. D E. Toward the viewer. F. Away from the viewer. T. The vector is zero. G. AA