Which of the following statements is true of the apparent magnitude scale that refers to stellar apparent brightness?
A) It tells you the intrinsic brightness of a star.
B) It tells you how bright stars appear to you on Earth.
C) It tells you the amount of light a star produces.
D) It tells you the accurate distance between two stars.
B
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A satellite in an elliptical orbit about a planet travels much faster when it is directly over a
A) large ocean. B) large island. C) high mountain range. D) great plain or plateau. E) none of the above
The Oort Cloud is believed to have been formed by:
A) planetesimals that were flung far from the Sun in gravitational encounters with the jovian planets. B) icy bodies formed between stars that have been captured by our solar system's gravity. C) moons that escaped from the jovian planets. D) debris from an icy planet that broke apart early in the solar system's history. E) debris from impacts of planetesimals, asteroids and comets with the jovian planets.
The quantum mechanical model of the hydrogen atom requires that if the principal quantum number is 6, there will be how many different permitted orbital quantum number(s)?
a. 5 b. 12 c. 6 d. 36 e. 13
What is the wavelength of a monochromatic light beam, where the photon energy is 2.00 eV? (h = 6.63 × 10^-34 J×s, c = 3.00 × 10^8 m/s, 1 nm = 10-9 m, and 1 eV = 1.6 × 10^-19 J)
a. 414 nm c. 311 nm b. 1243 nm d. 622 nm