Dark nebulae are opaque to all wavelengths of electromagnetic radiation
Indicate whether the statement is true or false
FALSE
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The Martian polar caps are composed of frozen
A. water and carbon dioxide. B. water and sulfuric acid. C. water and methane. D. methane and carbon dioxide.
In the H-R diagram, the bright blue-white stars that dominate the naked eye sky lie to the:
A) top left. B) top right. C) middle of the main sequence. D) top center. E) bottom left.
You drop a stone down a well that is 9.5 m deep. How long is it before you hear the splash? The speed of sound in air is 343 m/s and air resistance is negligible
A) 1.2 s B) 1.4 s C) 1.3 s D) 1.6 s E) 1.5 s
Two large non-conducting plates of surface area A = 0.25 m2 carry equal but opposite charges Q = 75 ?C. What is the energy density of the electric field between the two plates?
A) 1.7 × 107 J/m3 B) 5.1 × 1015 J/m3 C) 3.4 × 107 J/m3 D) 0 E) 2.5 × 1015 J/m3