Back when the Industrial Age was in motion many workers were hurt on the job, but keep working because they didnt get any money if they did not work. This lead to the contamination of products such as meat and other food items. Also children began to work back then as well and when mothers learned that thier children were getting hurt they demanded money to pay for the cost of medical bills.
Lifting a weight 10 times is a kind of ISOTONIC contraction. Holding a heavy machine part steady while securing it in place may be categorized as ISOMETRIC contraction. Lifting heavy cans and putting them on a shelf may be called an ISOTONIC contraction. Flexing your leg muscles and holding the flex is an ISOMETRIC contraction. Lifting your heavy book bag several times is good ISOTONIC contraction.
Mental health ...... Hope that helps
Good conductors of heat- aluminium, Iron, Lithium, Beryllium.
poor conductors- Mercury, Hydrogen, titanium, Chromium
