2 bodies of masses 2kg and 10kg have position vectors (3i+2j-k) and (i-j+3k) respectively. The distance of the centre of mass from the origin is 2.73 units. TRUE or FALSE? PLEASE HELP ASAP​

Identify the type of synthetic material used in each object

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

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.