The magnetic field lines produced by a current in a straight wire
A. are directed outward in a direction perpendicular to the wire
B. are directed in concentric circles around the wire
C. begin on one side of the wire and end on the other side of the wire
B. The magnetic field lines produced by a current in a straight wire are directed in concentric circles around the wire
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Which of the following is true of Jupiter's moon Europa?
A) It is rich in organic molecules and water. B) It appears to have a liquid-water ocean below its icy crust. C) It has methane in its atmosphere. D) It was brimming with life in its history.
Temperatures in New York City are warmer in July than in January because Earth is closer to the Sun in July than in January.
Answer the following statement true (T) or false (F)
Similar to the crystallization of silicate minerals, the crystallization of evaporite minerals occurs in a step-by-step process. The evaporite minerals that are the most difficult to dissolve
A) precipitate last. B) precipitate first followed by the minerals that dissolve more easily. C) have the lowest solubility and are the last to precipitate. D) have the highest solubility and are the first to precipitate.
The Sun is not seen as yellow-green because
A) it is not yellow-green. B) it is small part of a mixture of other colors in sunlight. C) its brightness is only slightly greater than the other colors. D) our vision is not adapted to yellow-green.