Hubble's Law (also known as the Hubble-Lemaitre Law) can be restated as:
A. The mass-to-light ratio of a spiral galaxy is greater if its rotational velocity is also greater.
B. The more distant a galaxy, the faster it is receding.
C. The rotation curve of a galaxy is related to the amount of mass inside.
D. The velocity curves of spiral galaxies only make sense if there exists a lot of unseen matter.
Ans: B. The more distant a galaxy, the faster it is receding.
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A. when the Moon and the Sun are on the Celestial equator B. when the Sun is between Earth and the Moon C. when the Moon is between Earth and the Sun D. when Earth is between the Sun and the Moon
Two stars that have the same absolute magnitude also have the same luminosity.
Answer the following statement true (T) or false (F)
A circuit consists of N resistors, all of resistance R, connected as shown below. A potential difference V is applied to the circuit. The equivalent resistance of the circuit is
A.
B.
C.
D.
E.
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What will be an ideal response?