An astronaut stands on the surface of a spherical asteroid that has a weak gravitational field.

Ahands-free device may only be used if it can be activated or deactivated with a

How are 3-d printers useful in studying evolution? a. to color the fossils of organisms b. to create clones of extinct organisms c. to create replicas of fossils d. to prepare paper cutouts of organisms e. to study the composition of fossils

Which of the answer is a characteristic of what osha calls "permit-required confined space? "