Which is the term for a material's ability to burn in the presence of oxygen?

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

In which of these cases are the two wave points considered to be in phase with each other?

Which position represents spring in the southern hemisphere? a) b) c) d)