MARK YOUR ANSWERS ON THIS SHEET AND TURN IT IN.
c=3x1010 G=6.7x10-8 h=6.6x10-27 s=5.7x10-5
1pc=3x1018cm 1AU=1.5x1013cm Msun=2x1033g Rsun=7x1010cm
F=ma x=vt v=at
_____ 1. The spectrum of continuous (blackbody)
radiation can be used to find the temperature of a distant object by
_______ 2. At the end of its life, the sun will expand to
many, many times its current radius. Assuming
the temperature stays the same, what is the increase in luminosity (energy
output) if the sun increases in radius by a factor of 10?
_____ 3. Asteroid X orbits the Sun in eight years.
How many AU is it from the Sun?
______ 4. Our TA is ticketed for running a red light.
His defense to the
traffic judge is that he was traveling so fast, the red light had doppler
shifted to be a green light. How
fast must Randy have been going for this to have happened?
_____ 5. The thermal radiation from solid objects (such as
rocks) contains strong emission lines. True
_____ 6. Emission and absorption lines in
astronomical objects are used to:
_____ 7. An apple dropping to Earth accelerates at
1000cm/s/s for 3 seconds. How fast
is it going at the end of the 3 seconds?
_____ 8. The star Capella is yellow, Proxima Centauri
is red, Procyon is green, Arcturus is orange, and
Rigel is blue. Which is
_____ 9. The relation between a photon's wavelength and its
frequency is given by:
______ 10. If the Moon were to have oceans, how long
would it be between high tides?
_______ 11. Name the four forces of nature in order of increasing strength, weakest first.
_______ 12. Name the six principal bands of the electromagnetic spectrum in order of increasing wavelength, shortest first.