Measuring Properties of Stars - Quiz 12

1. A star has a parallax of 0.04 arc seconds. What is its distance?

A)..4 light years B)..4 parsecs C).. 40 parsecs D)..25 parsecs E)..250 parsecs

2. A star radiates most strongly at 400 nanometers. What is its surface temperature?

A)...400 K B)...4000 K C)...40.000 K D)...75,000 K. E)...7500 K

3. Which of the following stars is hottest?

A)... An M star. B)... An F star C)... A G star D)... A B star E)... An O star

4. A star that is cool and very luminous must have

A)... a very large radius. B)... a very small radius. C)... a very small mass. D)... a very great distance. E)... a very low velocity.

5. In what part of the H-R diagram do white dwarfs lie?

A)... Upper left B)...Lower center C)... Upper right D)...Lower right E)... just above the Sun on the Main Sequence.

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