Choose the best answer. The Milky Way Galaxy
a. is part of a cluster of a few dozen galaxies.
b. is about 200 light-years in diameter.
c. is the largest known object in the universe.
d. is part of a cluser of a few dozen galaxies, is about 200 ly in diameter, and is the largest known object in the universe
e. is part of a cluster of a few dozen galaxies and is the largest known object in the universe
a
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The wavelength of a periodic wave is 0.750 m. If the frequency is 425 Hz, then what is the velocity of the wave?
A. 210 m/s B. 276 m/s C. 319 m/s D. 410 m/s E. 472 m/s
The existence of amino acids in carbonaceous chondrites proves that life on Earth originated in space.
Answer the following statement true (T) or false (F)
An object is placed 10 cm in front of a concave mirror with a 20-cm focal length. Determine the image location (in cm)
a. ?20 b. ?15 c. ?10 d. ?5 e. 6.7
Climate models which ignore human activity
A) completely fail to match real climate data B) match real climate data quite well C) match real climate data perfectly D) match real climate data, but only poorly