Withdrawal symptoms vary with the substance, but some symptoms may include increased heart rate, shaking, insomnia, fatigue, and irritability. Substance abuse is continued use of a substance in spite of school-or work-related or interpersonal problems, but the user has not gotten dependent on the substance.The individual who abuses a substance may experience legal problems and may have problems fulfilling responsibilities, such as caring for a child.ithdrawal symptoms vary with the substance, but some symptoms may include increased heart rate, shaking, insomnia, fatigue, and irritability. Substance abuse is continued use of a substance in spite of school-or work-related or interpersonal problems, but the user has not gotten dependent on the substance.
ton. n. 1. A unit of weight equal to 2,000 pounds (0.907 metric ton or 907.18 kilograms). Also called net ton, short ton. 2. A unit of weight equal to 2,240 pounds (1.016 metric tons or 1,016.05 kilograms). Also called long ton. 3. A metric ton.
The metric ton (also known as the tonne) is a metric unit of weight equal to 1,000kg (1 megagram, a term that is almost never used). It is a non SI unit that is in common usage given that it is equal to 2,204.6 lbs which is close to the UK imperial ton (2,240lb) and the US customary units ton (2,000lb).he metric ton (also known as the tonne) is a metric unit of weight equal to 1,000kg (1 megagram, a term that is almost never used). It is a non SI unit that is in common usage given that it is equal to 2,204.6 lbs which is close to the UK imperial ton (2,240lb) and the US customary units ton (2,000lb).