While standing on railway platform and heating the whistle
of an engine coming towards us , we hear the sound
increasing; bit when the engine is receding from us it
appears to fall why ?
- 1 Answers
- 2454 Views
- I also Faced
- E-Mail Answers
Answer Posted / guest
When the source of sound is moving, the wave length,
frequency and velocity of sound waves alter or appear to
alter, (It is called Doppler Effect).
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
Why graphite rod is used in nuclear reactor?
What is si unit of viscosity-coefficient?
Why is ammonia-ammonium chloride buffer added?
What is the application of hardness date in environmental engineering practice?
Acid value definition is number milligrams of koh required to nuetralise the acid present in one gram oil & fats but why not use naoh for nuetralisation?
What is the reaction that occurs during the titration?
What are filters? Why are they used?
Explain the structure of a dna molecule?
What is the reaction that occurs between iodine and sodium thiosulphate?
Why ph scale range is 14? Why it is not less or not greater than 14? Solution of hcl or hydrogen containing liquid has a ph. But if the solution is kmno4 here nothydrogen power does it ph?
why is acetic acid less conductive than hcl?
How many electrons does benzene have?
What is fluidity of a liquid?
Write the chemical formula for epsom salts?
How is arsenic produced?
