What does Newton's third law describe? A. Action- reaction pairs

B. The relationship between force, mass, and acceleration

C. How interim affect the motion of an object

D. How friction and the normal force are related

answer : A

explanation : The force exerted on an object is the action, and the force experienced by the object as a consequence of Newton’s third law is the reaction..

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

Which simple machine is not part of this compound machine? a. lever b. pulley c. inclined plane d. wheel and axle

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?