When an ordinary mercury thermometer is placed in hot water, its reading drops at first, but then quickly rises. explain why?

It becomes colder as the thermometer stays inside the beaker for longer. Also, the thermometer would be at the bottom of the beaker and there all of the cold water is collected as it is very dense and so it sinks whereas the hot water is less dense and rises.

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.

12 is probably the typical age for a first kiss but i think its to young.