A tethered spinal cord is a disorder in which a child's spinal cord is pulled down and stuck, or fixed, to the spinal canal.The spinal cord normally floats free inside the spinal canal. As a child grows, the spinal cord must be able to move freely inside the spinal canal. tethered spinal cord is a disorder in which a child's spinal cord is pulled down and stuck, or fixed, to the spinal canal.
Surface Tension Surface tension is the skin-like surface of a liquid due to the cohesive forces between the liquid molecules. The diagram below shows an imagined magnified view of the surface of water, the molecules of liquid at the surface do not have other like- molecules above them.
Think about what would happen if you put your finger into the water. The water molecules would stick to your skin and youâd have to dry them off. When water is in a cup or a bowl like this its âstickinessâ creates a kind of skin on the top of the water. Thatâs called surface tension, and it allows light things to stay on the surface without sinking because they donât break the surface tension.