Type the wave numbers

Exercise and reference answers

Questions

1. Answer

   331

   Question

   Experimental speed of sound in air at STP, in metres per second?

2. Answer

   280

   Question

   Speed of sound in air from the Newton formula, in metres per second?

3. Answer

   2

   Question

   Beat frequency when two waves of 11 Hz and 9 Hz combine, in hertz?

Instructions

Type the number only.

Explanation