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Post a LessonAnswered on 18/04/2024 Learn CBSE - Class 9/Science/Unit 1-Matter - Its Nature & Behaviour/Matter in our surroundings
Sadika
Water droplets collect on the outer surface of a glass container containing ice due to condensation. When warm, humid air comes into contact with the cold surface of the glass containing ice, the air cools down, causing water vapor in the air to condense into liquid water droplets on the glass surface.
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Answered on 18/04/2024 Learn CBSE - Class 9/Science/Unit 1-Matter - Its Nature & Behaviour/Matter in our surroundings
Sadika
Solids have a fixed shape because their particles are held closely together by strong intermolecular forces, restricting their movement to vibrational motion around fixed positions. Liquids and gases, on the other hand, do not have fixed shapes because their particles are free to move past each other and take the shape of their container due to weaker intermolecular forces.
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Answered on 18/04/2024 Learn CBSE - Class 9/Science/Unit 1-Matter - Its Nature & Behaviour/Matter in our surroundings
Sadika
It is advisable to use a pressure cooker at higher altitudes because at higher altitudes, the atmospheric pressure is lower, which lowers the boiling point of water. Using a pressure cooker increases the pressure inside the cooker, allowing water to boil at a higher temperature and cook food faster.
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Answered on 18/04/2024 Learn CBSE - Class 9/Science/Unit 1-Matter - Its Nature & Behaviour/Matter in our surroundings
Sadika
Answered on 18/04/2024 Learn CBSE - Class 9/Science/Unit 1-Matter - Its Nature & Behaviour/Matter in our surroundings
Sadika
Water is liquid at room temperature due to the unique arrangement of its molecules, which allows for hydrogen bonding between water molecules. These hydrogen bonds give water its relatively high boiling point and keep it in a liquid state at room temperature.
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