How long must a constant current of 50. 0 a be passed through an electrolytic cell containing aqueous cu2+ ions to produce 3. 50 moles of copper metal?.

In the image, layer a is the topmost layer. layer c contains fossils from the precambrian era. layer b contains dinosaur fossils, and layer a contains fossils of mammals. which two statements are supported by this evidence? 1. mammals lived before the precambrian era. 2. dinosaurs and mammals existed in the precambrian era. 3. dinosaurs evolved after precambrian organisms. 4. precambrian organisms evolved after dinosaurs. 5. precambrian organisms were the first life-forms to become fossilized, according to this sample.

Whats begin with t, ends with t has t in it

A24-n net force acts on a 8-kg rock.what is the acceleration of the rock?