Question

Your mobile is kept on table which is at 1.7 m from you. Assume that the

alarm tune has frequency of 500 Hz and wavelength of 68 cm (have you

realized that this will be very dull and monotonous tone?). What will be the

time taken (in milli-seconds) by this sound to reach you from table?​

Answer 1

Explanation:

68cm = 0.68 m

frequency = velocity/ wavelength

velocity = 500Hz × 0.68m

= 340 m/s

now time = distance/ velocity

t = 1.7m /340

=5 millisec.

PLEASE MAKE IT BRAINLIEST!!

Answer 2

Time taken by the sound?

Given :-

Distance of mobile from the person = 1.7 m

Frequency of alarm tune = 500 Hz

Wavelength = 68 cm = 0.68 m

Now,

We know that,

Frequency = Velocity/Wavelength

500 = Velocity/0.68

Velocity = 500 * 0.68

Velocity = 340 m/s

We also know that,

Time = distance/speed or displacement/velocity

Substitute the values,

Time = 1.7/340

Time = 0.005 seconds = 5 milliseconds

→ The time taken by the sound to reach the person from the table is 5 milliseconds.