If the temperature of a fixed amount of an ideal gas is increased, it NECESSARILY follows that
A) the pressure of the gas will increase.
B) the volume of the gas will increase.
C) the speed of the gas molecules will increase.
D) All of the above statements are correct.
C
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Two charged particles repel each other with a force F. If the charge of both particles is tripled and the distance between them is also tripled, then the force will be
A) F. B) 2 F. C) F/2. D) F/4. E) none of the above
Why do hydrogen gas clouds glow red?
A: Remnants of ancient supernova explosions, they've cooled from white hot to reddish over the course of millions of years. B: Their light is highly red-shifted because of the high speeds with which the gas clouds are moving. C: They're members of the Cool Cosmic Clouds Party (CCCP). D: Decay of trace radioactive elements within them heats the clouds until they glow red. E: Electromagnetic radiation from nearby stars heats the clouds until they glow red.
Molecular Bonds: Van der Waals bonding is due to
A. the sharing of electrons between atoms. B. the transfer of electrons between atoms. C. unequal charge distribution around neutral molecules. D. atoms bonding to hydrogen molecules.
The possibility of extraterrestrial life was first considered
A) after the invention of the telescope B) only during the past few decades C) thousands of years ago during ancient times D) at the turn of the 20th century