You are in the doctor's office and notice that the metal instrument tray feels much colder than the exam table you are sitting on. This is because
A. the tray actually is colder than the table.
B. the exam table has a cushion inside, which is a good insulator.
C. the metal conducts heat away from your hand more quickly than does the table.
C. the metal conducts heat away from your hand more quickly than does the table.
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A terrestrial world's lithosphere is
A) a thin layer of rock that lies between the mantle and crust. B) the interior region in which the planet's magnetic field is generated. C) a layer of hot, molten rock encompassing the core and part of the mantle. D) a layer of relatively strong, rigid rock, encompassing the crust and part of the mantle.
The polarization in a vacuum capacitor is equal to _________.
Fill in the blank(s) with the appropriate word(s).
If the distance between us and a star is doubled, with everything else remaining the same, its luminosity
A) is decreased by a factor of two, and its apparent brightness is decreased by a factor of two. B) remains the same, but its apparent brightness is decreased by a factor of four. C) is decreased by a factor of four, and its apparent brightness is decreased by a factor of four. D) remains the same, but its apparent brightness is decreased by a factor of two. E) is decreased by a factor of four, but its apparent brightness remains the same.
Because of their low surface gravities, the Moon and Mercury lack ________
Fill in the blank(s) with correct word