Two forces are applied on a soccer ball. which of the following statements explains why the ball accelerates?
a. the net force applied to the ball is 0 n.
b. the ball resists one force but not the other.
c. newton's second law does not apply to round objects.
d. the two forces are unbalanced.

Ways that industry and agriculture use physical properties to separate substances

Which of the following types of electromagnetic radiation has the longest wavelength? a. infrared light b. visible light c. ultraviolet light d. microwaves

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.