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Experiment to Understand : Air Expands on Heating Video Lecture | Class 7 Oxford Science: Chapter Notes, Worksheets & Tests
FAQs on Experiment to Understand : Air Expands on Heating Video Lecture - Class 7 Oxford Science: Chapter Notes, Worksheets & Tests
| 1. How does air expand on heating? |  |
Ans. When air is heated, the molecules in the air gain energy and move faster. This increased energy causes the molecules to spread out, leading to an expansion of the air volume.
| 2. What happens to the air when it expands on heating? | |
Ans. When air expands on heating, its volume increases. This expansion can be observed through various phenomena, such as the rising of hot air balloons or the expansion of air in a closed container when heated.
| 3. Why does air expand on heating? | |
Ans. Air expands on heating due to the increase in molecular movement and energy. As the air molecules absorb heat energy, they vibrate and move more vigorously, causing the air to expand and occupy a larger space.
| 4. Does air always expand on heating? | |
Ans. Yes, air generally expands on heating. This behavior is governed by the ideal gas law, which states that as the temperature of a gas increases, its volume also increases, assuming the pressure remains constant.
| 5. What are the practical applications of understanding air expansion on heating? | |
Ans. Understanding air expansion on heating has various practical applications. It is essential in thermodynamics and engineering, where it is used to design and operate various systems, such as engines, refrigerators, and air conditioning units. Additionally, it is also crucial in weather forecasting and atmospheric science, as it helps explain phenomena like convection currents and the formation of clouds.
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