Which of the following discribe a solution

Think of a glass of warm water and a spoonful of salt. Once the salt is mixed into the warm water it will dissolve and become a homogeneous solution. If the glass of water is then put into a pot on the stove the water can be boiled away (in the form of steam) and a visible layer of salt will remain in the pot.

14 days is the half-life of phosphorus-32

it should have an internal chamber and two thermometers sticking out of the top. the internal chamber will also be closed off from the outside.