Sometimes, the glasses themselves are responsible for causing the headache. If you wear glasses and find that you experience headaches on a regular basis or even once in a while, take the time to investigate why it may be happening, because wearing eyeglasses shouldnât cause you any pain.
coÂ·heÂ·sion. n. 1. The act, process, or condition of cohering: exhibited strong cohesion in the family unit. 2.
Cohesion: Water is attracted to water. Adhesion: Water is attracted to other substances. Adhesion and cohesion are water properties that affect every water molecule on earth and also the interaction of water molecules with molecules of other substances. Essentially, cohesion and adhesion are the stickiness that water molecules have for each other and for other substances. You can see this in the picture to the right. The water drop is composed of water molecules that like to stick together, an example of the property of cohesion. The water drop is stuck to the end of the pine needles, which is an example of the property of adhesion.