Free or low-cost ______ images, including photographs and clip art, are available online.
A. stock
B. generic
C. spec
D. streaming
Answer: A
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Which moon orbits Pluto?
a. Ceres b. Eris c. Charon d. Oberon e. Triton
Which of the following is NOT icy in composition?
A) comet nuclei B) Kuiper Belt Objects C) the polar cap of Mars D) asteroids E) most Jovian satellites
What is the energy of a photon with the Compton wavelength (0.00437 nm)? (h = 6.63 × 10^?34 J?s, c = 3.00 × 10^8 m/s, and 1 eV = 1.60 × 10^?19 J)
a. 4.55E–14 eV b. 2.84E+5 eV c. 2.84E+1 eV d. 3.52E–6 eV e. 4.55E+5 eV
The Earth's orbit has a mean radius of 1.5 × 108 km. Over a six-month period, the apparent position of a particular star varies by 0.00014° due to parallax. How distant is the star, in km?
A) 1.2 × 1011 km B) 1.2 × 1014 km C) 1.2 × 1017 km D) 1.2 × 1020 km E) 1.2 × 1023 km