Transmission of Heat

The land breeze occurs at night when the land cools faster than the sea, causing air to flow from the land to the sea.

Refrigerators primarily use convection to transfer heat, circulating cool air to maintain a low temperature.

Heat from the sun reaches us through radiation, which does not require a medium to travel.

Plastic and wood are called insulators because they do not conduct heat well, preventing heat transfer.

Temperature is the measure of the degree of hotness or coldness of an object.

Copper is known for its high thermal conductivity, making it an excellent conductor of heat.

Radiation is the mode of heat transfer that can occur through a vacuum, as it does not require a medium.

White surfaces are poor radiators of heat because they reflect most of the heat instead of absorbing and re-emitting it.

Heat naturally flows from a region of higher temperature to a region of lower temperature.

Insulation refers to preventing heat transfer and is not a mode of heat transfer itself.

Conduction primarily occurs in solids due to the close proximity of molecules allowing efficient heat transfer.

Metals are typically good conductors of heat due to their free electrons that facilitate heat transfer.

Materials like wood, plastic, and glass are called insulators because they do not conduct heat well.

Convection occurs in liquids and gases due to the movement of fluid particles.

Radiation is the mode of heat transfer that can occur in a vacuum.

Heat from the Sun is received through radiation, which can travel through the vacuum of space.

Birds can glide for hours due to convection currents in the atmosphere, which help them stay aloft with minimal effort.

Black color absorbs heat the fastest because it absorbs all wavelengths of light and converts them into heat.

A vacuum flask is designed to reduce heat transfer by conduction, convection, and radiation.

A refrigerator works on the principle of heat transfer, moving heat from inside to the outside environment.

When two bodies at different temperatures come into contact, heat flows from the hotter body to the colder body until thermal equilibrium is reached.

Transfer of heat refers to the movement of heat from a region of higher temperature to a region of lower temperature.

The three modes of heat transfer are conduction, convection, and radiation.

Conduction occurs most effectively in solids due to the close proximity of molecules.

In conduction, heat transfer occurs through the vibration of molecules, passing energy from one molecule to the next.

Frying pans are given wooden or plastic handles to prevent heat transfer by conduction, keeping the handle cool and safe to touch.

Copper is one of the best conductors of heat due to its high thermal conductivity.

Materials that do not conduct heat are called bad conductors or insulators.

Heat transfer in solids mainly occurs through conduction, where heat is transferred through molecular vibrations.

Woollen clothes are warm in winter because they trap body heat and prevent heat loss, acting as insulators.

Convection takes place in liquids and gases, where fluid movement allows heat transfer.

The cool air that blows from the sea towards land during the daytime is called a sea breeze.

Radiation does not require any medium for heat transfer, allowing it to occur even in a vacuum.

A dull black surface is the best absorber and radiator of heat because it absorbs all wavelengths of light and emits heat efficiently.

People in hot countries paint their houses in light colors to reflect sunlight, which helps keep the interior cool.

Shiny surfaces are poor absorbers and radiators of heat because they reflect most of the incoming radiation.

Radiation is the mode of heat transfer that allows us to receive heat from the sun, as it can travel through the vacuum of space.