Explain how magnetic forces enable a maglev train to float above the tracks. magnetic forces use two main components to keep a maglev train afloat. they first use lifting forces, (force that pushes upward with a lot of pressure, enough to counteract gravity.) it also uses stability, ( this ensures that the train will not flip or slide out of control.) am i right?

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.

Avector of magnitude 2 cannot be added to a vector of magnitude 3 so that the magnitude of the resultant is a. zero b. 1 c. 3 d. 5 e. 7

Blank is the perceived frequency of a sound wave