What mathematical formula correctly expresses the relationship between force, mass and acceleration? a. m = f + a b. f = m / a c. a = mf d. f = ma

D. F=ma

F is for force, and that equals two things, M for mass and A for acceleration. When mass is accelerated, it gives you force. Force equals multiplying mass and its acceleration.

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.