Dark nebulae are opaque to all wavelengths of electromagnetic radiation

Indicate whether the statement is true or false


FALSE

Physics & Space Science

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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

Physics & Space Science

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

Physics & Space Science

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.

Physics & Space Science

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.

Physics & Space Science