Aconstant horizontal force f is applied to a 5 kg box on a frictionless horizontal surface. the box starts from rest and moves 12 meters in 5 seconds.
a) what is the magnitude of the force f?
b) if the force is withdrawn at the end of the 5 seconds, how far does the box move in the next 5 seconds?

carbon atoms with different numbers of electrons

Explanation:

Carbon-12 has 6 neutrons, carbon-13 has 7 neutrons, and carbon-14 contains 8 neutrons. Carbon-12 and 13 are stable isotopes, which means that the nucleus does not undergo radioactive decay. Carbon-14 possesses an unstable nucleus which undergoes radioactive decay