Which of the following is not an advantage that radio telescopes have over optical telescopes?
A) They are generally less expensive.
B) They have better resolution.
C) They can operate 24 hours a day.
D) They are less affected by the conditions of the atmosphere.
E) They can "see" through interstellar dust clouds.
B
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Which rare-earth metal is used to make nickel-metal-hydride batteries?
A. lanthanum B. ytterbium C. europium D. terbium
Instructions: Choose one answer from each pair or group of selections. Would LONGITUDE or LATITUDE generally have the greatest effect on a region's climate?
_______________ refers to the volume of pore space in rock in proportion to the total volume of rock material
Fill in the blank(s) with correct word
Which number on this figure indicates heating by conduction?
A. 1, direct contact between the burner and the pan B. 2, heating by thermal radiation through the air C. 3, heated water expands and rises to the top of the pan and then cools and flows back down D. 4, moving a pan of water away from the stove