What is the specific heat of an unknown substance if a 2.50 g sample releases 12 calories as its temperature changes from 25°c to 20°c?
ob
oc
od
-0.96 cal/g °c
1,350 cal/g °c
0.96 cal/g °c
30 cal/g °c

While standing outdoors one evening, you are exposed to the following four types of electromagnetic radiation: yellow light from a sodium street lamp, radio waves from an am radio station, radio waves from an fm radio station, and microwaves from an antenna of a communications system. rank these type of waves in terms of increasing photon energy.