For a rope obeying hooke's law show that the elastic potential energy stored in the rope is given by
e=1/2kx^2
where k is the elastic spring constant and x is the extension.

Why do electron microscopes have higher resolving power than light microscopes?

Road users moving into your lane, brake lights, and abrupt changes in road surface are a. rare at night b. indicators of potential hazards c. not worth worrying about before you reach them d. no problem for experienced drivers

Determine the age of a fossil if it had only one eighth of its original carbon-14 content remaining?