А group of students are investigating what happens when you put different temperatures of water together. In this investigation, they have set up a vial
of colorless room-temperature water and are adding purple hot water at the
bottom of the vial, using a pipette
What do you predict happens in the first 5 seconds.

B. The hot water mixes all through the vial

Explanation:

The hot water is able to mix all through the vial because when water is heated, it's molecule are loosed. They are able to speed up and spread, occupying a larger volume. Hot water is less dense than room-temperature water and the hot water can float on room-temperature water.

away from the curb

explanation:

the wheels would then hit the curb if it started to rolling, decreasing the chance of an accident.