4. Someone took the last cookie in the cookie jar last night. The LAST person to leave this scene is the culprit. Who was it? (see below)

O

A. The cook with the motor cycle

B. The maid with the car

O

C. The handyman with the bike

D. The nephew and the dog

What’s the answer

The free body diagram shows a box being pulled to the left up a 25-degree incline. the magnitude of the normal force is

Which is the correct symbol for an isotope of iodine with 53 protons and 78 neutrons?

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.