Write on Newton law of cooling and cooling collision.
Since this is not my area of expertise, I searched Google under the key words "Newton law of cooling and cooling collision" to get these possible sources:
http://www.google.com/search?client=safari&rls=en&q=Newton+law+of+cooling+and+cooling+collision&ie=UTF-8&oe=UTF-8
Do not just copy. Express ideas in your own words to help you understand the concepts better.
In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.