PLEASE HELP!! What type of exercise are you completing if you contract your muscles to produce movement?
A. concentric
B. eccentric
C. isometric
D. isotonic

The electronic structure or chlorine is 2.8.7 what is the electronic structure of fluorine?

Suppose that 27 j of work is needed to stretch a spring from its natural length of 6 m to a length of 9 m. (a) how much work is needed to stretch the spring from 12 m to 14 m? j (b) how far beyond its natural length will a force of 78 n keep the spring stretched?

The ability to make things happen is also called a. heat b. force c. matter d. energy