Question

Mrs. Johnson's kid is trying to drink with a straw that runs through an airtight cork in the top of a bottle of water. Please explain to her kid why he won't get any water.

Answer 1

straws operate because atomospheric pressure pushes the water up. A cork prevents that.

Answer 2

a straw works because when you lower the pressure on one end (by sucking), atmospheric pressure pushes the liquid from the other end

the airtight cork prevents the atmospheric pressure from pushing on the liquid, so it won't go up the straw