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| 1. |
A closed container has air at 20°C. Some air at 50°C is inserted into the centre of the container. In which direction will this air move–upwards, downwards or not all? |
| Answer» A closed container has air at 20°C. Some air at 50°C is inserted into the centre of the container. In which direction will this air move–upwards, downwards or not all? | |