Question

jenelle placed a metal pole in the flame of a candle to prove that conduction transfers heat through touch. how could she alter this investigation to examine radiation?
a she could use a plastic pole instead of a metal pole because a plastic pole has to be used for radiation to occur.
b she could place the metal pole on a heat source that is not an open flame because the flame causes the thermal energy to transfer by radiation.
c she could place the metal pole at a chosen distance from the flame. this would allow the thermal energy to travel through space to reach the metal pole.
d she could place the metal pole in water before placing it in the flame. this would stop the pole from catching fire, and it would allow the thermal energy to travel through space to reach the metal pole.

Explanation:

Radiation is the transfer of heat energy through space by electromagnetic waves. Placing the metal pole at a chosen distance from the flame allows heat transfer via radiation as the thermal - energy travels through space to reach the pole. Option A is incorrect as the type of pole (plastic or metal) is not a determining factor for radiation. Option B is wrong because an open - flame can transfer heat by radiation, and changing the heat source to non - open flame doesn't directly examine radiation. Option D is incorrect as placing the pole in water before putting it in the flame is related to preventing combustion, not to examining radiation.

Answer:

C. She could place the metal pole at a chosen distance from the flame. This would allow the thermal energy to travel through space to reach the metal pole.