A sound wave has a wavelength of 4.0 m. The distance from a compression center to the adjacent rarefaction center is:
A. 0.4m
B. 2.0m
C. 4.0m

Arrange the images in order to show how lake-effect snow occurs.

Sort the images based on whether there's a force of attraction or repulsion between the magnets shown. attraction repulsion

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.