An ideal gas is held in a container of volume V at pressure P. The rms speed of a gas molecule under these conditions is v. If now the volume and pressure are changed to 2V and 2P, the rms speed of a molecule will be
A) 1/2 v
B) v
C) 2v
D) 4v
E) v/4
C
Physics & Space Science
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Which type of nebula is produced when a star, hotter than 25,000 K, excites the gas near it to produce an emission spectrum producing a distinctive pink color?
a. emission nebulae b. H I c. reflection nebulae d. dark nebulae e. spectral type B6
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The Sun's magnetic field is highlighted by the visible arches of prominences
a. True b. False Indicate whether the statement is true or false
Physics & Space Science
Collisions between galaxies have little effect on the individual stars
Indicate whether the statement is true or false
Physics & Space Science
Most of the carbon dioxide on the Earth
A) is dissolved in the oceans, forming carbonate rocks B) has frozen out in the polar regions C) has escaped into space D) is still present in the atmosphere
Physics & Space Science