University Of Knowledge

[Mr.Khan]

Re: University Of Knowledge

Question ~ Why is the boiling point of sea water more than that of pure water?


Answer ~ Sea water contains salt and other impurities, which cause an elevation in its boiling point.

[Mr.Khan]

Re: University Of Knowledge

Question ~ Why does a liquid remain Hot or Cold for a long time inside a Thermos Flask?


Answer ~ The presence of air, a poor conductor of heat, between the double glass wall of a thermos flask, keeps the liquid hot or cold inside the thermos for a long time. :)

[*khushi*]

Re: University Of Knowledge

v3ry us3ful :rose

[Mr.Khan]

Re: University Of Knowledge

Question ~ Why do we bring our hands close to the mouth while shouting across to someone far away?


Answer ~ By keeping hand close to mouth the sound is not allowed to spread ( phenomenon of diffraction of sound ) in all direction, but is directed to a particular direction & becomes louder.

[Anmol121]

Re: University Of Knowledge

thx alot 4 sharing such a wond3rful post with us
which is r3ally informativ3 ,keep it up

[BANJARAH]

Re: University Of Knowledge

Zabardast

[*Rida*]

Re: University Of Knowledge

Question ~ Why is the boiling point of sea water more than that of pure water?


Answer ~ Sea water contains salt and other impurities, which cause an elevation in its boiling point.

Question ~ Why does a liquid remain Hot or Cold for a long time inside a Thermos Flask?


Answer ~ The presence of air, a poor conductor of heat, between the double glass wall of a thermos flask, keeps the liquid hot or cold inside the thermos for a long time. :)

Question ~ Why do we bring our hands close to the mouth while shouting across to someone far away?


Answer ~ By keeping hand close to mouth the sound is not allowed to spread ( phenomenon of diffraction of sound ) in all direction, but is directed to a particular direction & becomes louder.

:super:

[Mr.Khan]

Re: University Of Knowledge

Question ~ Why is the sky blue?

Answer: Violet and blue light have short waves which are scattered more than red light waves.
While red light goes almost straight through the atmosphere, blue and violet light are scattered by particles in the atmosphere. Thus, we see a blue sky.

[Mr.Khan]

Re: University Of Knowledge

Question ~ Why does some liquid burn while other do not?


Reason: A liquid burns if its molecules can combine with oxygen in the air with the production of heat. Hence oil burns while water does not.

[MR.Fkas]

Re: University Of Knowledge

zbr10

[ChaMpioN PaKiStaNi]

Re: University Of Knowledge

Greattttttttttttttttttttt

[Tanha Hassan]

Re: University Of Knowledge

Nice sharing Bro

[crystal_thinking]

Re: University Of Knowledge

very informative :thmbup:

[Mr.Khan]

Re: University Of Knowledge

Question ~ Why does ice float on water but sink in alcohol?

Answer ~ Because ice is lighter than water so it floats on it. However, ice is heavier than alcohol & therefore it sinks in Alcohol.

[Mr.Khan]

Re: University Of Knowledge