Why is it that a long jumper keeps his body long and straight before the jump?

Holes drilled several kilometers into earth’s crust provide direct evidence about earth’s interior in the form of

What can you increase the strength of an electromagnet by

The california mussel (mytilus californianus) attaches itself to a rock or other solid surface with a bundle of filaments known as the byssus. imagine that 15.0 j of work is done to stretch the distal end of the byssus. it releases 10.8 j of thermal energy as it relaxes. what is the resilience of the distal end of the byssus?