Define reference frame in your own words. Give an example of how you could use different reference frames for the same motion.

Reference frame can be defined as from the perspective of an individual to tell if an object is moving.

Example:

Eienstien used a reference frame in his train thought experiment.

no, the red giant is the hottest with 2.00.000.000 degrees celsius. while the white dwarf only 25,000 degrees celsius.