Compounds that have the same molecular formula but different structural formulas are called structural, or constitutional,
a. isomers.
b. derivatives.
c. congeners.
d. isotopes.
e. progeners.
a
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In the figure, a very small toy race car of mass m is released from rest on the loop-the-loop track. If it is released at a height 2R above the floor, how high is it above the floor when it leaves the track, neglecting friction?
A) 1.67 R B) 2.00 R C) 1.50 R D) 1.33 R E) 1.25 R
Which law of thermodynamics addresses the direction of heat flow?
A) First law B) Second law C) Third law D) all of the above
Which of the following statements is false?
a. The majority of surface rocks are igneous. b. The study of rocks is called petrology. c. Rocks are classified as igneous, sedimentary, or metamorphic. d. Rocks are composed of one or more minerals.
As streams move downslope, channel dimension generally
A) decreases with decreased discharge. B) increases with decreased discharge. C) narrows. D) widens.