12. The average amount of time it takes for Earth to complete a rotation on its
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Question
12. The average amount of time it takes for Earth to complete a rotation on its axis is A) meridian day. B) 24-hour day. C) sidereal day. D) mean solar day. E) solar day. 13. The longest day (daylight) of the year for the Northern Hemisphere occurs at the called a time of the autumnal equinox. B) vernal equinox. C) winter solstice. D) summer solstice. 14. When one travels east while passing over the International Date Line, A) the date is decreased one day. B) the time is decreased one hour D) the date is advanced one day. E) none of these occurs. An object transported from Earth's surface to the surface of the Moon has 15. A) a different mass and the same weight. B) the same weight, but different mass. C) the same mass and the same weight. D) different mass and different weight. E) none of these 16. One megawatt contains how many watts? A) 10.0 x106 B) 101 C) 10° D) 10.0 x 103 18. Which of the following is not considered a major physical science: A) Physics B) Astronomy C) Astrology D) Chemistry E) Earth ScienceExplanation / Answer
12.
Answer : (C) sidereal day
Explanation: It takes Earth slightly over 23 hours 56 minutes to rotate once around this axis.In this time all the stars to revolve once around the Earth and astronomers call this time period a sidereal day.
13.
Answer: (D) Summer solstice
Explanation: Solstice occurs twice a year once in the year and once in the summer.
The longest day will occur at the time of summer solstice
14
Answer: (A) The date is decreased one day
15
Answer: (E)
Explanation: The object will have same mass but different weight.
Weight = mass× acceleration due to gravity (g)
And at moon , g'= g/6
So weight will be changed
16. Answer: (C) 106 W
Explanation :
1 MW = 1×106 W
17.
Answer: astrology
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