Asextant is an instrument used to measure the angle between any two visible objects. a. true b. false

The answer is True.

A for true because a sextant is used to find the angle between two visibile objects
                        

Particle exchange energy though elastic collision , hope this .

Ithink this is what you meant. the temperature at which a liquid begins to boil is called the boiling point. the boiling point of water is 212°f or 100°c.  and at that point will start to turn into steam (gas)