PHYS20-HW2-answers(1)

PHYS20-HW2-answers(1) - 1. Place the following in order...

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1. Place the following in order from longest wavelength to shortest: (1) Gamma rays - 6 (2) Infrared rays - 2 (3) Radio waves - 1 (4) Ultraviolet radiation - 4 (5) X-ray radiation - 5 (6) Visible light - 3 2.When it is summer in Australia, it is: (a)winter in the United States. (b)summer in the United States. (c)spring in the United States. (d)fall in the United States. 3.Why summer is warmer than winter? (a)because summers last longer (b)because the Sun shines on the summer hemisphere more directly (c)because oceans keep the heat and release it to the atmosphere (d)because the Earth is closer to the Sun in summer 4.The contrast between seasons is greater in the northern hemisphere. Why? (a)because of the distribution of land and water in the north compared to the south (b)because northern hemisphere is always closest to the Sun (c)because of the axis of rotation of the Earth (d)because more people live in the northern hemisphere 5.How long is the period of precession of the Earth's axis? (a)27 years (b)15,000 years (c)26,000 years (d)3,500 years 6.Due to the precession of the Earth's axis: (a)Polaris will always be the north star (b)Polaris will not always be the north star (c)the length of the days change with time (d)the length of the seasons will change with time 7.What causes the precession of the Earth's axis? (a)combined effect of the gravity of the Sun, the Moon and the rotational motion of the Earth in its orbit (b)the high and low tides in the oceans on the Earth (c)the rotation of the Earth alone (d)the Earth's magnetic Feld
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8.If there is going to be a total lunar eclipse tonight, then you know that: (a)the Moon ʼ s phase is full. (b)the Moon ʼ s phase is new. (c)the Moon is unusually close to Earth. (d)it is the summer solstice. 9.What causes lunar eclipses?
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This note was uploaded on 11/17/2011 for the course PHYSICS 20 taught by Professor Mubarek during the Spring '11 term at UC Riverside.

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PHYS20-HW2-answers(1) - 1. Place the following in order...

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