Question

Answer in 30-40 words.
1. How does transfer of heat take place in solids? Justify your answer with the help an experiment.
2. Explain with a diagram how land breeze originates.
3. Explain with a diagram how hot object remains hot and cold object remains cold in a thermos flask.​

Answer 1

Answer:

1. In other words, heat is transferred by conduction when adjacent atoms vibrate against one another, or as electrons move from one atom to another. Conduction is the most significant means of heat transfer within a solid or between solid objects in thermal contact. Fluids—especially gases—are less conductive.

2. The land breeze blows during the night from land to sea and the land becomes cooler faster than the sea. The air above the sea becomes less dense (i.e. warmer) and rises. The cooler air from the land moves in to take its place.

3. A thermos is also called a vacuum bottle because it uses a vacuum—a space that has no air in it—to keep heat from escaping from hot things inside; it also keeps heat from getting inside to make cold things warmer. (Heat is caused by the motion of molecules.)

Answer 2

Explanation:

heat is transferd by conduction when adjent atoms vibrate against one another or as elctrons move from one atom to another conduction is the most sufficient means of heat transfer within a solid between solid objects in thermal contact.