Which of the following is true of sounds?
...Which of the following is true of sounds?
sound travels faster in air at 20oC than at 30oC
the frequency of a given sound wave changes when it crosses the boundary seperating two media
the wavelength of a given sound wave in air decreases as the temperature increases
sound waves cannot be reflected
Correct answer is C
No explanation has been provided for this answer.
The difference observed in solids, liquids and gases can be accounted for by ...
A piece of cloth appears green in sunlight. When held in red light, it will appear ...
The value of T in the figure above is ...
A satellite in circular motion around the earth does not have ...
An object is projected with a velocity of 100m-1 at an angle of 60° to the vertical. Calculate t...