Advertisements
Advertisements
प्रश्न
Give a scientific reason for the following:
In winter the birds fluff up their feathers.
Advertisements
उत्तर
In winter the birds fluff their feathers in order to trap air in their feathers so that the air provides heat insulation to their body from the surroundings and keeps them warm and saves them from winter.
APPEARS IN
संबंधित प्रश्न
How is the size of a degree defined on a Fahrenheit scale?
A body absorbs 1680 J of heat energy. How many calories of heat is absorbed by the body?
Name a substance which is an insulator of heat.
State one use of each of the following type of thermometer:
Laboratory thermometer
Explain with a diagram, the effect of the spherical shape of the earth on the temperature at different latitudes.
Distinguish between heat and temperature.
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.
Give reasons why –
chimneys are located high up in kitchens and factories
While a substance is undergoing a change of state, the temperature of the body remains ______.
