Diseases, conditions and injuries impacting the knee and lower leg. Pain in the front and center of the knee (usually underneath the kneecap) can occur in teenagers or young adults who are physically active. Rather than a physical abnormality, itâs caused by overuse or training without adequate stretching or strengthening exercises.
Gallons of water per metric ton A metric ton (1000 kg) of water occupies exactly one cubic meter. One cubic meter is 264.17 gallons.
Both are now defined in the metric system: US gallon: 3.785 411 784 L, exactly. Imperial gallon: 4.546 09 L, exactly. Even water isn't perfectly constant, ocean water weighs about 1.025X the weight of the same volume of fresh water due to the salt content.