:) The relationship between heat, pressure, density, and temperature in a substance is known as . Fill in the blank please

A given block of material has a temperature, a volume, and a weight.

The density can be calculated from the weight and volume, D = wt/volume

The weight and temperature is a measure of the heat energy contained in the mass,

If the temperature is raised, the heat energy in the mass in increased.

If the temperature is raised the material will expand and the volume increased and the density decreased.

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