Advertisements
Advertisements
प्रश्न
Why does a piece of ice when touched with a hand, appear cool? Explain.
Advertisements
उत्तर
On touching a piece of ice, heat flows from our hand (hot body) to the ice (cold body), and hence, it appears cold.
APPEARS IN
संबंधित प्रश्न
State the three units of temperature.
How is the size of a degree defined on a Celsius scale ?
Who is telling the truth?
The temperature of a substance is measured in joules.
Convert 20°C into Fahrenheit scale.0
What is the principle of calorimetry?
Do all substances expand on heating? Give examples.
Is it possible to boil water in a thin paper container? Explain with a reason.
The following figure shows a rectangular box with two tubes P and Q at the top. A burning candle R is placed under the tube P. The candle burns brightly.

Explain:
(i) How is the air in the box circulating?
(ii) What will happen if the opening Q is closed?
When a substance is heated, its temperature ______.
