It is summer in the Northern Hemisphere when
A) the Northern Hemisphere is located closer to the Sun than the Southern Hemisphere.
B) the Northern Hemisphere is tilted toward the Sun and the Southern Hemisphere is tilted away.
C) Earth is at its nearest point to the Sun along its orbit.
D) Earth's axis points toward the North Star, Polaris.
B) the Northern Hemisphere is tilted toward the Sun and the Southern Hemisphere is tilted away.
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List the terrestrial planets in increasing order of their size.
A. Mercury, Venus, Earth, Mars B. Mercury, Mars, Venus, Earth C. Venus, Earth, Mars, Mercury D. Earth, Mars, Venus, Mercury
A frictionless simple pendulum on Earth has a period of 1.75 s. On Planet X its period is 2.14 s. What is the acceleration due to gravity on Planet X?
What will be an ideal response?
The electric field 1.5 cm from a very small charged object points toward the object with a magnitude of 180,000 N/C. What is the charge on the object? (k = 1/4??0 = 8.99 × 109 N • m2/C2)
A) -4.5 nC B) +4.5 nC C) -5.0 nC D) +5.0 nC
Pure water is classified as
A. an insulator. B. a conductor. C. a semiconductor. D. all of these choices are correct E. none of these choices are correct