What is the upper limit for the temperature to which a liquid substance can be raised?

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

What is the overall order of reaction for rate = k[no]2[o2]

In which phase(s) do the molecules take the shape of the container?