Which example is a way that intercellular communication occurs? A signal is sent from a nerve cell to a muscle cell.

A signal is translated into action for a muscle cell to contract.

A signal is sent down an exon within a nerve cell.

A molecule is sent from one part of a cell to another.
PLZ HELP ASAP

Often called simply "velocity," this is the velocity of an object at a particular moment in time.

Ametal ring 4.20 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpendicular to the magnetic field. these magnets produce an initial uniform field of 1.12 t between them but are gradually pulled apart, causing this field to remain uniform but decrease steadily at 0.240 t/s . (a) what is the magnitude of the electric field induced in the ring? (b) in which direction (clockwise or counterclockwise) does the current flow as viewed by someone on the south pole of the magnet?

What is friction? how does it affect the motion of an object?