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RoseWind [281]
2 years ago
12

Galaxies are classified based on their a. shape. c. stars. b. color. d. age.

Physics
2 answers:
ArbitrLikvidat [17]2 years ago
7 0
<span> the answer is shape.</span>
Bogdan [553]2 years ago
7 0

Answer:

The answer is shape

Explanation:

Just took the test

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How can astrophysicists tell whether a star is receding from or approaching earth?
MrMuchimi

Answer:

Doppler shift of the starlight

Explanation:

To predict the movement of a star, we compare the spectra of elements found in star (H, He Na etc.), first spectra which are obtained from star and second spectra from laboratory. If spectral lines of the spectra obtained from star, are shifting towards red end (called red shift) then star is going away from earth and if shifting is towards blue (called blue shift), then star is approaching the earth. This is Doppler's shift.

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3 years ago
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3 years ago
A 2000 kg car slams on the brakes and slows down at a rate of -10 m/s2. How much force are the brakes applying?
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Answer:

-20,000N

Explanation:

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5 0
2 years ago
A circular test track for cars has a circumference of 3.5 kmkm . A car travels around the track from the southernmost point to t
elixir [45]

Answer:

(A) Distance will be equal to 1.75 km

(B) Displacement will be equal to 1.114 km

Explanation:

We have given circumference of the circular track = 3.5 km

Circumference is given by 2\pi r=3.5

r = 0.557 km

(a) It is given that car travels from southernmost point to the northernmost point.

For this car have to travel the distance equal to semi perimeter of the circular track

So distance will be equal to =\frac{3.5}{2}=1.75km

(b) If car go along the diameter of the circular track then it will also go from southernmost point to the northernmost point. and it will be equal to diameter of the track

So displacement will be equal to d = 2×0.557 = 1.114 m

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3 years ago
An object is most likely to sink in water if
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Answer:

High density D answers to your questions

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