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.
2. (Units) Also called: short ton or net ton US a unit of weight equal to 2000 pounds or 907.184 kilograms. 3. (Units) Also called: metric ton or tonne a unit of weight equal to 1000 kilograms. 4. (Units) Also called: freight ton a unit of volume or weight used for charging or measuring freight in shipping.
A long ton (sometimes known as a gross ton or weight ton) is the name used in the US for the unit called the ton in the avoirdupois or Imperial system of measurements, as used (alongside the metric system) in the United Kingdom and several other Commonwealth countries. It is equal to 2240 pounds (exactly 1016.0469088 kilograms).