how does a thermos flask maintain the temperature of liquids kept in it ?
Answers
Answer:
yes it maintains the temperature of liquid the hot water will remain hot till 8 hours this proves that it does
Explanation:
it maintains the temperature of liquid the hot water will remain hot till 8 hours this proves that it does. by convection current
Explanation:
Heat is a kind of energy that moves around our world in three different ways called conduction, convection, and radiation. If you touch something hot, heat flows straight into your body because there's a direct connection between you and the hot object. Heat conduction happens only when things touch.
Convection, on the other hand, can happen without the need for direct contact. If you switch on a fan heater, it blows hot air through a grille into your room. Hot air is less dense (lighter, effectively) than cold air so it rises upwards. As hot air starts to climb up from a fan heater, it has to push colder air out of its way. So the cooler air near the ceiling of your room moves back toward the floor to get out of the way. Pretty soon, there's a kind of invisible conveyor belt of warming, rising air and cooling falling air and this gradually warms up the room. When heat moves in this way, using a moving liquid or gas to travel from one place to another, we call it convection. Heating soup in a saucepan is another way of using convection