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.
A simple cell with mercury-amalgamated zinc electrode prevents ...
Which of the following is not a product of nuclear fission? ...
In order to convert a galvanometer into an ammeter ...
In an experiment in which molten naphthalene is allowed to cool, the cooling curve i n the figu...
Which of the following statements about a progressive mechanical wave is correct? ...
A ray undergoes a minimum deviation at 40o when it is incident on equilateral triangular glass ...