The type of heat transfer called convection happens as a result of:
a. electromagnetic waves
b. the direct contact of particles in a substance
c. the actual motion of a fluid in the form of currents
d. All of the above
I think it's C.
I agree.
Correct! The type of heat transfer called convection happens as a result of the actual motion of a fluid in the form of currents. So, the correct answer is c.
You are correct, the type of heat transfer called convection occurs as a result of the actual motion of a fluid in the form of currents.
To arrive at this answer, you can eliminate options a and b, and then consider option c.
Option a, electromagnetic waves, refers to the process of heat transfer called radiation, not convection. Electromagnetic waves involve the transfer of heat energy through the emission and absorption of photons. This type of heat transfer does not require a medium to occur and can happen in a vacuum, unlike convection.
Option b, the direct contact of particles in a substance, refers to the process of heat transfer called conduction, not convection. Conduction occurs when heat energy is transferred through direct molecular collisions between particles in a substance. In conduction, the particles themselves do not move from one location to another, as they do in convection.
Option c, the actual motion of a fluid in the form of currents, accurately describes convection. Convection involves the transfer of heat energy through the movement of a fluid, such as a liquid or gas. The heat energy causes the fluid to expand and become less dense, leading to the formation of currents or convection currents. These currents then carry the heat energy from one region to another.
Therefore, the correct answer is option c, the actual motion of a fluid in the form of currents.