Question

which forms of energy are observed as a candle at rest quietly burns?
select all that apply
a electrical
b thermal
c chemical
d electromagnetic radiation

Explanation:

• Electrical energy: A candle burning doesn't involve electrical energy as there's no electrical circuit or current involved. So option a is incorrect.
• Thermal energy: When a candle burns, heat is released, so thermal (heat) energy is observed. Option b is correct.
• Chemical energy: The wax and wick undergo a chemical reaction (combustion) to release energy, so chemical energy is involved (stored in the wax and released during burning). Option c is correct.
• Electromagnetic radiation: A burning candle emits light, which is a form of electromagnetic radiation (visible light). Option d is correct.

Answer:

b. thermal, c. chemical, d. electromagnetic radiation