Advertisements
Advertisements
प्रश्न
A bimetal strip is shown in the below diagram before heating. Draw a diagram to show how it bends on heating and on cooling.
उत्तर
The diagram is to show how the given strip bends and cools. Due to heating, the copper bends more than invar due to the high coefficient of linear expansion of copper.
APPEARS IN
संबंधित प्रश्न
Two iron rods – one 10 m long and the other 5 m long, are heated to the same rise in temperature. Which will expand more?
Why is one end of a steel girder in a bridge kept on rollers instead of fixing it in pillar?
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.
Give scientific reason.
An ordinary glass bottle cracks when boiling water is poured into it, but a borosil glass bottle does not.
What is the velocity of thermal radiations?
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.
Solids ______ on heating and ______ on cooling.
What is thermal expansion?
Analogy:
Ordinary glass:: Glass tumbler.
Pyrex glass:: ______.
