How can we best observe the Sun's chromosphere and corona?
A) The chromosphere is best observed with ultraviolet telescopes and the corona is best observed with X-ray telescopes.
B) The chromosphere is best observed with infrared telescopes and the corona is best observed with ultraviolet telescopes.
C) The chromosphere and corona are both best studied with visible light.
D) The chromosphere and corona are both best studied with radio telescopes.
A) The chromosphere is best observed with ultraviolet telescopes and the corona is best observed with X-ray telescopes.
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First Law of Thermodynamics: A 10-L flask and a 1-L flask each contain two moles of ideal diatomic gas (but not the same gas) at 25°C. Which of the following statements about these gases must be true? (There could be more than one correct choice.)
A. The internal (thermal) energy of the gas in both flasks is the same. B. The internal (thermal) energy of the gas in the larger flask is greater than the internal (thermal) energy of the gas in the smaller flask. C. The internal (thermal) energy of the gas in the smaller flask is greater than the internal (thermal) energy of the gas in the larger flask. D. The molecules in the larger flask have the same root-mean-square speed as those in the smaller flask. E. The molecules in the smaller flask have the same average kinetic energy per molecule as those in the larger flask.
Monochromatic light (? = 500 nm) is incident on a soap bubble (n = 1.40). How thick is the bubble (in nm) if destructive interference occurs in the reflected light?
A. 102 B. 179 C. 54 D. 1 E. 89
Terrestrial planets, like Earth, are made up of rock and metal
a. True b. False Indicate whether the statement is true or false
A Geiger counter placed 1 meter from a point source of radiation registers 100 counts per minute. If the Geiger counter is moved closer, half-way to the source, the counting rate will be
A) 25 counts/min. B) 50 counts/min. C) 100 counts/min. D) 200 counts/min. E) 400 counts/min.