Which is a result of using a machine? 1.The amount of work that is done is increased.

2.The work input is less than the work output.

3.Both the force and the distance through which it acts increase

4.The distance through which a forge acts increases, and the force decreases.

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

the mantle

explanation:

earth is divided into three layers: the crust or the outermost layer on which we live; the underlying, middle layer - the mantle - and the core (the innermost layer of earth).

14 days is the half-life of phosphorus-32