How does the half life of an isotope relate to the stability of its nucleus?

The longer the half-life, the more stable the nucleus is.

Explanation:

Well, you know that nuclear half-life represents the time needed for an initial sample of a radioactive substance to be halved. If this is the case, a long half-life would imply that it takes a very long time for the nuclide to decay to half of its initial mass. This of cource means that it is very stable.

hope this helped c; if it did give me the brainlist please c;

the independent variable, the one that is intentionally manipulated, is whether or not the car hits the barrier.

the dependent variable, the one that you measure the response in, is the distance that the washers travel.