Give an example of a system in which people use steam for a mechanical advantage.

Steam turbines

Explanation:

Mechanical advantage is used to describe the attainment of an amplified force output from a minimal force input

Steam is the water in gaseous form

Therefore, an example of where people use steam for mechanical advantage includes the steam turbines in power generation being turned by steam produced from burning water from a supply.

Here the expansion of the water to steam provides power to drive the the turbines so as to perform mechanical work.