A solar eclipse may occur
a. when the Moon is first quarter phase.
b. when the Moon is 3rd quarter phase.
c. when the Moon is full.
d. when the Moon is new.
d
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Phobos and Deimos are believed to be captured ____
a. comets b. planetesimals c. planetoids d. asteroids e. meteorites
Suppose it is a crescent moon, as seen from Earth. How would Earth appear to someone on the Moon at this time?
A) The side of Earth facing the Moon is completely bright. B) The illumination of the Earth does not change, as viewed from the Moon. C) Half of the side of Earth facing the Moon is bright and half is dark. D) Most of the side of Earth facing the Moon is bright.
What is nature's speed limit??
A: Refractive index. B: Planck's constant. C: Frequency of light. D: Wavelength of light. E: Speed of light.
All charged rods have the same length and the same linear charge density (+ or -). Light rods are positively charged, and dark rods are negatively charged. For which arrangement below would the magnitude of the electric field at the origin be largest?