Question

multiple-choice question when two objects touch, thermal energy transfers from... hotter to colder substances by convection both transfers occur at the same time hotter to colder substances by conduction colder to hotter substances by convection colder to hotter substances by conduction rewatch

Explanation:

1. Recall the principles of heat transfer: Thermal energy (heat) naturally flows from a region of higher temperature (hotter substance) to a region of lower temperature (colder substance).
2. Analyze the types of heat transfer: Conduction is the transfer of heat through direct contact between objects. Convection involves heat transfer through the movement of fluids (liquids or gases). When two objects touch, the heat transfer is by conduction, not convection.
3. Evaluate each option:

• "hotter to colder substances by convection": Incorrect, because touching involves conduction, not convection.
• "both transfers occur at the same time": Incorrect, as the scenario is direct contact (conduction), and convection isn't the primary mode here.
• "hotter to colder substances by conduction": Correct, as heat flows from hotter to colder, and direct contact means conduction.
• "colder to hotter substances by convection": Incorrect, heat doesn't flow from colder to hotter spontaneously in this context, and the mode is wrong.
• "colder to hotter substances by conduction": Incorrect, heat flows from hotter to colder, not the reverse.

Answer:

hotter to colder substances by conduction