Why do you think we use asphalt and tars/waxes (heavier, thicker, higher boiling point fraction) in our roads and roof coatings? Why not use gasoline of diesel in a roof coating or road (what would it do, what is its problem)? b) Could you burn tar as a fuel in your car? If so, what would you have to do to it to make it work?

Ascientist wants to know how individual lions within a pride interact with each other in their own environment. to do this, the scientist sedates and tags all of the lions within a pride. then, he places several remotely-controlled video cameras near the lions' den and performs an observational field study. he collects continuous video footage over the span of one year, analyzes the video, and then forms conclusions based on his observations.