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प्रश्न
Where am I?
The mean annual temperature is 25°C around me.
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उत्तर
Central Africa
संबंधित प्रश्न
A bridge is made from 20 m long iron rods. At temperature 18∘C, the distance between two rods in 0.4 cm. Up to what temperature will the bridge be in good shape?
Distinguish between heat and temperature.
Explain the following
In winter, water tanks (or ocean) start freezing from the surface and not from the bottom.
Define coefficient of linear expansion. Write its SI unit.
Explain the following:
In a solid, heat is not transferred by the process of convection.
When a window is accidentally left open on a winter night, will you feel uncomfortable because the cold is getting in, or because the heat is escaping from the room?
Consider the statement given below and choose the correct option.
Assertion: A system can be converted from one state to another state.
Reason: It takes place when the temperature of the system is constant.
Mention the three units which are used to measure the temperature.
Give reasons why –
chimneys are located high up in kitchens and factories
