SAT Subject Physics Practice Question 630: Answer and Explanation

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Question: 630

11. Whether a substance is a solid, liquid or gas is determined by

A. conductivity.
B. number of protons.
C. temperature.
D. number of neutrons.
E. resistively.

Correct Answer: C


The correct answer is (C). The physical characteristics of melting and boiling are directly related to how much thermal energy a substance contains. The measure of the thermal energy is temperature.

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