Download App

Thermal Properties of Matter — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsThermal Properties of Matter1 Mark
Question
Why do birds swell their feathers in winter?
✓

Answer

They swell their feathers and maintain a column of air, which is an insulator, to avoid loss of heat from body to the surrounding (cold).

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "1 Marks Question" from Thermal Properties of Matter→Thermal Properties of Matter — all question types→Physics STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

What is the luminous flux of a source emitting radio waves?
→
A light source emits monochromatic light of wavelength 555nm. The source consumes 100W of electric power and emits 35W of radiant flux. Calculate the overall luminous efficiency.
→
The length of a wire is reduced by half. What will be the effect on the increase in its length under a given load?
→
Will a current loop placed in a magnetic field always experience a zero force?
→
Explain why :
a body with large reflectivity is a poor emitter.
→
Black body radiation is white. Comment.
→
Why is a woman's voice sweeter than a man?
→
A wave is represented by an equation $\text{y}=\text{c}_1\sin(\text{c}_2\text{x}+\text{c}_3\text{t}).$ In which direction is the wave going ? Assume that c1, c2 and c3 are all positive.
→
What is the average friction force when a person has a usual 1km walk?
→
State if the following statements is true or false. Give reasons for your answer:
In an inelastic collision, the final kinetic energy is always less than the initial kinetic energy of the system.
→