What gives the Moon a coppery glow during a total eclipse?
a. Sunlight refracted through Earth's atmosphere
b. Sunlight reflected from Earth's surface
c. Not all of the sunlight is blocked out
d. The artificial light reflected up from Earth's surface
e. The spectral emissions of the gases that make up Earth's atmosphere.
a
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When a wave source moves toward a receiver what does the receiver encounter?:
a) An increase in wave speed b) Nothing c) An decrease in wave frequency d) An increase in wave frequency
According to the first law of thermodynamics, for any process that may occur within an isolated system, which of the following choices applies?
a. entropy remains constant b. entropy increases c. entropy decreases d. None of the above choices apply.
A disk, a hoop, and a solid sphere are released at the same time at the top of an inclined plane. They all roll without slipping. In what order do they reach the bottom?
A) disk, hoop, sphere B) hoop, sphere, disk C) sphere, disk, hoop D) hoop, sphere, disk E) hoop, disk, sphere
Name each of the factors in the Drake equation
What will be an ideal response?