Question

frequency 50
hz; wavelength 1 cm; find the wave speed​

Answer 1

Answer:

The speed of the sound, distance travelled and the time taken relationship is given as follows.

Speedofsound,v=Distancetravelled×Timetaken ----eqn 1

With the given values of wavelength = 50 cm = 0.5 m and frequency =1000 Hz, the speed of the wave is calculated as follows.

Speedofsound,v=Frequency(ν)×Wavelength(λ) -- eqn 2

That is, v=ν×λ=1000Hz×0.5m=500m/s

Substituting the value of the speed of sound in eqn 1 gives the time taken for the sound wave to travel a distance of 500 m.

That is, Timetaken=

Distancetravelled

Speedofsound

=

500m

500m/s

=1second.

Hence, the time taken for the sound wave to travel is 1 second.

Answer 2

Answer:

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The change in velocity in unit time is called acceleration.

Acceleration is a vector.

The direction of acceleration will be in the direction of change in velocity.

Its SI unit is metre / second ² abbreviated as m/s²

Answer 3

Answer:

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The change in velocity in unit time is called acceleration.

Acceleration is a vector.

The direction of acceleration will be in the direction of change in velocity.

Its SI unit is metre / second ² abbreviated as m/s²