Which of the following expresses Newton's third law? a. The total momentum of an isolated system always remain constant.
b. Acceleration is always accompanied by a force.
c. Every action force is accompanied by an equal and opposite reaction force.
d. Objects tend to remain at rest or in motion at constant speed

Two polarizers are oriented at 70∘∘ to one another. unpolarized light falls on them. what fraction of the light intensity is transmitted?

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Carbon is allowed to diffuse through a steel plate 15 mm thick. the concentrations of carbon at the two faces are 0.65 and 0.30 kg c/m^3 fe, which are maintained constant. if the preexponential and activation energy are 6.2 x 10-7 m2 /s and 80,000 j/mol, respectively, compute the temperature at which the diffusion flux is 1.43 x 10^-9 kg/m^2 -s.