Which statement accurately describes binary star systems?
2 answers:
Answer:
The correct answer is D.They have stars that may appear to wobble.
Explanation:
Binary star - Wikipediaen.wikipedia.org › wiki › Binary_star
''Astronomers have discovered some stars that seemingly orbit around an empty space. Astrometric binaries are relatively nearby stars which can be seen to wobble around a point in space, with no visible companion. The same mathematics used for ordinary binaries can be applied to infer the mass of the missing companion''
<em>-Wikipediaen.wikipedia.org › wiki › Binary_star </em>
<em> </em>
<em>-Edge 2021</em>
<em>Iv'e done this one before. </em>
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<h2>Some commonly look like this:</h2><em />
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Answer: Her acceleration is -0.8 m/s²
Explanation:
The initial velocity of Sandra ( u) = 10 m/s
The final velocity of Sandra ( v) = 2 m/s
Time taken by Sandra (t) = 10 s
Let the acceleration of Sandra be 'a'
Using the equation of kinematics, we have
v = u + at
⇒ 2 = 10 + 10a
⇒ -8 = 10a
⇒
⇒ a = -0.8 m/s²
Hence, her acceleration is -0.8 m/s².