Heating

What is the fundamental definition of heating in physics?

• The process of increasing the internal energy of an object.

• The transfer of thermal energy from an object of higher temperature to one of lower temperature.

• The conversion of mechanical energy into thermal energy.

• The emission of electromagnetic waves by a hot body.

Which of the following describes the primary mechanism of heat transfer when a hot air balloon ascends?

• Conduction, as the air molecules directly touch the balloon's fabric.

• Radiation, as electromagnetic waves are emitted from the burner.

• Convection, as heated air circulates and rises within the balloon.

• Advection, as the balloon moves through different air masses.

At a microscopic level, how does conduction facilitate the transfer of thermal energy between two objects in direct contact?

• Electromagnetic waves carry energy across the interface.

• Faster-moving particles from the warmer object collide with slower-moving particles from the cooler object, transferring kinetic energy.

• Fluid currents are established, moving heated particles from one object to the other.

• Chemical bonds are broken and reformed, releasing energy.

When sitting near a campfire, which mode of heat transfer is primarily responsible for warming your hands if you hold them directly above the flames?

• Conduction

• Convection

• Radiation

• Absorption