A one-way mirror works because its surfaces are half-silvered
a. True
b. False
Indicate whether the statement is true or false
True
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Scientists recently confirmed the presence of water ice at the poles of the Moon. Where did this water come from?
A. Early lunar oceans evaporated quickly, and the water vapor condensed in deep polar craters. B. The ice is all that remains of the Moon's polar ice caps, present in the Moon's early history. C. Water was deposited on the Moon by cometary impacts, and it condensed in deep polar craters. D. The water is released as polar region crust stretches due to tidal forces from Earth. E. None of these choices are correct.
These four photos shows features of Earth that change with time, some fast and some slow.. Which of these features could not exist if Earth did not have a magnetic field?
According to the parameters derived for the Drake Equation, where should astronomers look for life in the Milky Way?
A) around F, G, or M stars that are in multiple star systems located in the galactic habitable zone with a multiple planet system with jovian outer planets and at least one terrestrial planet within the star's habitable zone B) around O, B, or A stars that are in single star systems located in the galactic nucleus with a multiple planet system with jovian outer planets and at least one terrestrial planet within the star's habitable zone C) around F, G, or M stars that are in single star systems located in the galactic habitable zone with a multiple planet system with jovian outer planets and at least one terrestrial planet within the star's habitable zone D) around O, B, or A stars that are in single star systems located in the galactic habitable zone with a multiple planet system with jovian outer planets and at least one terrestrial planet within the star's habitable zone E) around F, G, or M stars that are in single star systems located in the galactic habitable zone with a multiple planet system with no outer planets and at least one terrestrial planet within the star's habitable zone
A coffee maker, which draws 13.5 A of current, has been left on for 10.0 min. What is the net number of electrons that have passed through the coffee maker?
What will be an ideal response?