Since mercury is a toxic metal why is it used in liquid barometer instead of water

According to the kinetic-molecular theory, what happens to a liquid when it is transferred from one container to another? the volume and the shape stay the same. the volume increases to fill the new container, but the shape stays the same. the volume stays the same, but the shape changes to fit the new container. the volume and the shape change to fill the new container.

Which scenario is most similar to the type of collision that gas particles have according to kinetic molecular theory

Which rate indicates the number of children that would be born per woman if she were to live to the end of her child bearing years