The Hubble law is a relation between a galaxy's

a. mass and its luminosity.
b. distance and its luminosity.
c. mass and its recession velocity.
d. distance and its recession velocity.
e. mass and its diameter.


d

Physics & Space Science

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The N14 nucleus consists of

A. 21 protons and 7 electrons. B. 7 protons and 7 neutrons. C. 14 protons. D. 14 neutrons.

Physics & Space Science

A positive magnetic susceptibility is due to an applied magnetic field orienting electron _________in the direction of the applied magnetic field.

Fill in the blank(s) with the appropriate word(s).

Physics & Space Science

Superposition of waves can produce

A) reinforcement. B) cancellation. C) partial cancellation. D) all the above

Physics & Space Science

A force on an object is given by F(x) = (2.00 N/m)x + (-3.00 N/m3)x3. What is a potential energy function for this conservative force?

A) 2.00 N/m - 9.00x2 B) (-2.00 N/m)x2 + (3.00 N/m3)x4 C) -2.00 N/m + (-3.00 N/m3)x2 D) (-1.00 N/m)x2 + (0.750 N/m3)x4 E) -2.00 N/m + 9.00x2

Physics & Space Science