Infrared radiation causes phosphors to give off visible light ?

Select the word from the list that best fits the definition classification of most stars on the h-r diagram

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.

Petroleum contains energy. a. light b. kinetic c. chemical d. mechanical