Describe an example of a muscle contraction in a lower appendage joint and identify the bones of origin and insertion involved

Waianapanapa beach in hawaii is a black-sand beach that was formed by waves crashing against volcanic rock. the sand can be very hot on sunny days. which statement best explains why? o a. the black sand has no heat capacity. b. the black sand absorbs no radiation. o c. the black sand is immune to insolation. d. the black sand has a low albedo.

Can someone i have no idea of how to do this.

Why does the earth spin slowly, not faster? is it possible to prove it scientifically? can you prove it with math?