Final answer:
The calculations for volume expansion require using different coefficients of volume expansion for steel and gasoline to calculate their respective changes in volume based on the change in temperature.
Step-by-step explanation:
The volume expanders mentioned in the question refer to the calculations involved in predicting the change in volume of materials due to temperature changes. Specifically, these calculations involve the increase in volume of a steel tank and the gasoline contained within it. To calculate the increase in volume for the steel (ΔVS), we use the formula ΔVS = βs VS ΔT, where βs is the coefficient of volume expansion for steel, VS is the initial volume of the steel tank, and ΔT is the change in temperature. For the gasoline, a different coefficient of volume expansion would be used in a similar formula to calculate its change in volume.