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.
The US gallon is usually used for measuring volume of liquid or gaseous substances like gasoline, other types of fuel, etc. One US gallon is equal to roughly 3.79 liters, or 231 cubic inches.