The weather outside is frightful. The temperature is -22°F. What is the corresponding temperature in the Celsius scale?
A) -12°C B) -20°C C) -35°C D) -30°C E) -22°C
D
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Stars with surface temperatures near 10,000 K have the strongest hydrogen absorption lines in their spectra.
Answer the following statement true (T) or false (F)
Simple Pendulum: A ball swinging at the end of a massless string, as shown in the figure, undergoes simple harmonic motion. At what point (or points) is the magnitude of the instantaneous acceleration of the ball the greatest?
A. C B. A and D C. A and C D. A and B E. B
What kind of planets are most easily detected using the Doppler method?
A) high mass planets far from their host star B) low mass planets far from their host star C) low mass planets close to their host star D) high mass planets close to their host star E) planets that have been ejected from their systems
If two stars are the same temperature, how can one be more luminous than the other?
A. It can be closer. B. It can be a different spectral type. C. It can have stronger magnetic fields. D. It can have a larger radius. E. It can have a larger reaction rate in the core.