A nearby star has a parallax of 0.2 arc seconds. What is its distance?
A) .1 parsec
B) .2 parsec
C) .5 parsec
D) 5 parsecs
E) 50 parsecs
D
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Most of the energy produced in the Sun is released in the form of visible light from the photosphere. However, some energy is released from the upper layers of the solar atmosphere
Which of the following best describes where other forms of light are released? A) The chromosphere is the source of ultraviolet light, and the corona is the source of X-rays. B) The chromosphere is the source of infrared light, and the corona is the source of ultraviolet light. C) The chromosphere is the source of X-rays, and the corona is the source of radio waves. D) The convection zone is the source of ultraviolet light, and the upper photosphere is the source of X-rays. E) Radio waves can pass directly through the gas which allows us to see the core.
Identify the FALSE statement. You could summarize our Solar System's development by saying:
it formed solely from atoms generated by the big bang. its formation began as gravity pulled material into a bulbous disc. the central ball of the bulbous disc developed into the Sun. outlying material of the disc condensed into planetesimals. planetesimals coalesced to form the planets.
A pressure of 10.0 mm Hg is measured at the triple-point of water using a constant-volume gas thermometer. What will the pressure be (in mm Hg) at 50.0°C?
A. 68.3 B. 1.80 C. 31.8 D. 11.8 E. 8.50
If the wavelength of light in vacuum is 469 nm, what is the wavelength of light in a thin film of index of refraction 1.42?
A) 110 nm B) 220 nm C) 330 nm D) 440 nm E) 550 nm