The center of the galaxy has been studied extensively using visible light

a. True
b. False
Indicate whether the statement is true or false


False

Physics & Space Science

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Each choice below lists a spectral type and luminosity class for a star. Which one is a red supergiant?

A) spectral type M1, luminosity class V B) spectral type O9, luminosity class I C) spectral type G2, luminosity class V D) spectral type M2, luminosity class I

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A positron and an electron differ in:

a. spin. c. mass. b. charge. d. energy.

Physics & Space Science

The quantity "angular momentum" (in terms of the fundamental quantities of mass, length, and time) is equivalent to:

a. MLT?2 b. ML2T?1. c. ML2T?3 d. ML3T.

Physics & Space Science

What is the quark structure of a neutron?

a. uud b. udd c. uuu d. ddd e. the question does not make sense

Physics & Space Science