Will you be more ready than that when itâs time to talk to your daughter about her first period? That time may come sooner than you think. Although a girlâs first period usually occurs at about age 12, some girls experience their first period much earlier.
Air interdiction is a core airpower mission that has been conducted since World War I by virtually all air forces. In that war, the goal was to isolate the battlefield by strafing and bombing enemy supply lines.
Air gap (plumbing) An air gap, as it relates to the plumbing trade, is the unobstructed vertical space between the water outlet and the flood level of a fixture. A simple example is the space between a wall mounted faucet and the sink rim (this space is the air gap). Water can easily flow from the faucet into the sink, but there is no way that water can flow from the sink into the faucet without modifying the system.