The rigidly connected unit consists of a 2.5-kg circular disk, a 2.5-kg round shaft, and a 3.4-kg square plate. Determine the z-coordinate of the mass center of the unit.

Explain to someone who knows nothing about fossils the study of invertebrate paleontology and how it scientists understand the history of the earth. be sure your explanation contains a minimum of two complete sentences.

Can you match these to the correct definition

What radiation has a higher frequency than visible light