- As you ride in a car, both you and the car are moving
at a constant speed. If the car brakes suddenly, you
feel your body pulled forward. Why?
A. Your body is in motion, and its inertia keeps it in motion.
B. Your body is in motion, but its inertia brings it to rest.
C. Your body is at rest, but its inertia puts it in motion.
D. Your body is at rest, and its inertia keeps it at rest.

Which accurately compares concave and convex lenses?

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.