Answer to Question #341287 in Molecular Physics | Thermodynamics for rox

Question

The density of copper at 293 K is 8,940 kg/m³ and its linear expansion coefficient is 17.0 x 10⁻⁶ K⁻¹. Consider a hot cube of copper that is 1.0 cm on a side when its temperature is 1.356 K. What is the cube’s mass? 

Answer 1

$m=\frac{\rho V}{1+3\alpha∆t}=8.5~g.$