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aleksklad [387]
3 years ago
5

Spiral galaxy rotation curves are generally fairly flat out to large distances. Suppose that spiral galaxies did not contain dar

k matter. How would their rotation curves be different?(A) The orbital speeds would fall off sharply with increasing distance from the galactic center.(B) The rotation curve would be a straight, upward sloping diagonal line, like the rotation curve of a merry-go-round.(C) The orbital speeds would rise upward with increasing distance from the galactic center, rather than remaining approximately constant.(D) The rotation curve would look the same with or without the presence of dark matter.
Physics
1 answer:
Artemon [7]3 years ago
8 0

Answer:

A) The orbital speeds would fall off sharply with increasing distance from the galactic center.

Explanation:

The plot of radial distance versus the orbital speed of objects gives us the galaxy rotation curve. The theoretical and practical curves have significant difference. A possible explanation of this difference could be the existence of dark matter.

According to the theoretical calculations the curve should increase sharply and then decrease as the radial distance increases. The theoretical graph does not take dark matter into account. But the plot made by observations shows the plot increasing first then becoming constant as the radial distance increases.

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enyata [817]

Answer:

conductor

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2 years ago
Plz help me with this!
vagabundo [1.1K]
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3 years ago
Which of Newton's laws explains why satellites need very little fuel to stay in oribit?
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Sattelites don't need any fuel to stay in orbit. The applicable law is...."objects in motion tend to stay in motion". Having reached orbital velocity, any such object is essentially "falling" around the earth. Since there is no (or at least very little) friction in the vacuum of space, the object does not slow.... It simply continues.


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4 0
3 years ago
A projectile of mass 0.2 kg and an initial velocity of 50 m/s collides with the end of a blade attached to a turbine. The rotati
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8 0
3 years ago
A Carnot engine operates with an efficiency of 26.0% when the temperature of its cold reservoir is 281 K. Assuming that the temp
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Explanation:

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4 0
3 years ago
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