How does the density of copper at its melting point of 1356 K compare to that of copper at room temperature,293 K? Its linear expansion coefficient is 17.0 $\times$ 10^-6 K^-1. A) 1.054 times as large B) 1.018 times as large C) 0.946 times as large D) 0.982 times as large E) 0.947 times as large

Question

Quizplus · Accepted Answer

The density decreases with temperature due to thermal expansion. Using the linear expansion coefficient, the volume expansion can be calculated, and thus the density at the melting point is approximately 0.946 times the density at room temperature.

How Does the Density of Copper at Its Melting Point ×\times×

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