Advertisements
Advertisements
प्रश्न
Water is heated from 0°C to 4°C. Will it expand?
उत्तर
Substances expand on heating.
But WATER—CONTRACTS with heated from 0°C to 4°C. After that i.e. above 4°C water starts expanding.
APPEARS IN
संबंधित प्रश्न
What do you understand by thermal expansion of a substance?
A metal plate is heated. State three factors on which the increase in its area will depend.
An empty glass bottle is fitted with a narrow tube at its mouth. The open end of the tube is kept in a beaker containing water. When the bottle is heated, bubbles of air are seen escaping into water. Explain the reason.
An iron washer is heated State the effect on its density.
Give scientific reason.
An ordinary glass bottle cracks when boiling water is poured into it, but a borosil glass bottle does not.
What are the different types of thermal expansions?
The diagram shows a sketch graph showing a change in volume of a given mass of ice at -5°C to water at 15°C.
(i) Why does the temperature along BC remain constant?
(ii) When is the volume of water minimum?
(iii) At what temperature does water have maximum density? Explain.
What difference do you think heating the solid will make in their molecules?
