There are 300 light particles in an airtight container. Which adjustment would increase the speed of the particles?

Question

A. keeping the volume constant and cooling the container

B. keeping the temperature constant and increasing the container volume

C.keeping the temperature constant and increasing the container volume

D.keeping the pressure constant and increasing the temperature

Answer 1

Assuming that the question isn't about photons (particles of light), but rather low mass particles, the answer would be D. Temperature is a relative measure of the speed of molecules, so an increase in temp would increase their speed.