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| MeGA doubt:
speed of sound depends on the density of the medium in which it propagates..
as density decreases speed increases
as we all know water is denser than air..( i think it is)
but the speed of sound is much higher in water than in air? why??? |  | 
| asked by Roshan Geo Roy (yoboyyy) 8 years ago | 
| 3 | 
| Do we need to do derivations in calorimeter chapter |  | 
| asked by satwindersingh333 8 years ago | 
| 1 | 
| Electromagnetic rays for detection of metals? 
X or Gamma? |  | 
| asked by  (heisenberg69) 8 years ago | 
| 2 | 
| If gravity is attractive then why did the big bang occur and why is the universe expanding?
(Is it dark energy) |  | 
| asked by Catlover (catlover) 8 years ago | 
| 2 | 
| WHAT IS PHI (YEAH ITS OUT OF SYLLABUS)
BUT DOES ANYONE KNOW THE STORY OF IT/ITS VALUE? |  | 
| asked by Illuminati (xxskullkingxx) 8 years ago | 
| 1 | 
| Why does an empty test tube placed inside water shine like a mirror? |  | 
| asked by Ansh Thamke (ansh_cr7) 8 years ago | 
| 2 | 
| Just want to confirm. On which principles do the dc motor and ac generator based. |  | 
| asked by Shivaanee sharma (shivaanee22) 8 years ago | 
| 1 | 
| What derivations can be asked? |  | 
| asked by Ronaldo (techtoicsaf) 8 years ago | 
| 2 |