Which of the following is a longitudinal wave?
A. A wave on string under tension
B. A light wave
C. A sound wave in a gas
D. All of these choices are correct
E. None of these choices are correct
Answer: C
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Stars in the central bulge of the galaxy follow elongated orbits tipped steeply to the plane of the disk
a. True b. False Indicate whether the statement is true or false
When vapor transforms to a plasma, energy must be
A) absorbed by the vapor. B) released from the vapor. C) both of these D) neither of these
Molecular Bonds: Ionic bonding is due to
A. the sharing of electrons between atoms. B. the transfer of electrons between atoms. C. unequal charge distributions around neutral molecules. D. atoms bonding to hydrogen molecules.
Which of the following best describes the internal layering of Jupiter, from the center outward?
A) core of rock, metal, and hydrogen compounds thick layer of metallic hydrogen layer of liquid hydrogen layer of gaseous hydrogen cloud layer B) core of rock and metal mantle of lower density rock upper layer of gaseous hydrogen cloud layer C) core of solid rock layer of solid metallic hydrogen layer of pure liquid hydrogen cloud layer D) core of liquid hydrogen compounds liquid hydrogen layer metallic hydrogen layer gaseous hydrogen layer cloud layer