Achild sits on a partially filled balloon and decreases the volume by half. what happens to the pressure inside of the balloon?

The pressure inside of the balloon increases by half

Explanation:

We can think of the balloon as a container of air ,which is a gas with a determinate volume and pressure.

According to Boyle's law the volume of a gas is inversely proportional to its pressure.

For example, if a balloon volume is 3 liters  and the pressure inside the balloon 20 pascal and a man inflates the balloon up to 6 liters the pressure inside the balloon now is 10 pascal.

When a tank with 40 liters of nitrogen and 100 pascal of inner pressure is  compressed to 200 pascal of pressure, the volume goes down to 20 liters

So  when the volume increases the pressure decreases and vice versa

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.