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29) What is the Sun mainly made of?

A) hydrogen and oxygen B) nearly equal portions of all the elements C) carbon and nitrogen D) hydrogen and helium E) oxygen and carbon

30) Which of the following statements about the ecliptic plane is not true?

A) It is the plane of the Moon's orbit around Earth. B) During a lunar eclipse, the Moon lies in the ecliptic plane. C) The nodes of the Moon's orbit lie in the ecliptic plane. D) It is the plane of Earth's orbit around the Sun. E) During a solar eclipse, the Moon lies in the ecliptic plane.

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SadhaLv10
26 Jan 2021
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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

4) According to the ancient Greeks, the Earth was the center ofthe universe and the sun, moon, stars, and planets all went aroundthe Earth. In the 1543 Copernicus proposed the heliocentric theoryof the universe in which the Earth was just another planet orbitingthe Sun and only the moon orbited the Earth.

a) What is the speed at which the Moon goes around the Earth?
b) How does the Moon's orbital acceleration compare to theacceleration of objects near the surface of the Earth?
c) What is the magnitude of the force that the Earth's gravityexerts on the Moon to keep it in orbit?
d) According to Newton's third law, all forces occur in pairs. Whatis the reaction to the Earth's gravity on the moon? Explain.

The vernal equinox and the autumnal equinox are associated with two points 180° apart in the Earth's orbit. That is, the Earth is on precisely opposite sides of the Sun when it passes through these two points. From the vernal equinox. 185.4 days elapse before the autumnal equinox. Only 179.8 days elapse from the autumnal equinox until the next vernal equinox. Why is the interval from the March (vernal) to the September (autumnal) equinox (which contains the summer solstice) longer than the interval from the September to the March equinox rather than being equal to that interval? Choose one of the following reasons, (a) They are really the same, but the Earth spins faster during the "summer" interval, so the days are shorter, (b) Over the "summer" interval, the Earth moves slower because it is farther from the Sun. (c) Over the March-to-September interval, the Earth moves slower because it is closer to the Sun. (d) The Earth has less kinetic energy when it is wanner, (e) The Earth has less orbital angular momentum when it is warmer.

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