Two sounds waves having wavelenghth of 87cm and 88.5cm respectively when superimposed produce 10 beats per second find the velocity of sound
Answers
Answer:
sorry I don't know the answer
Explanation:
Brainly.in
What is your question?
BrainlyHelper
BrainlyHelper
07.12.2018
Physics
Secondary School
+15 pts
Answered
Two sound waves having wavelengths of 87 cm and 88.5cm respectively, when superimposed, produce 10 beats per second. Find the velocity of sound (Ans : 513.3 m/s)
1
SEE ANSWER
Log in to add comment
Answers
Me · Beginner
Know the answer? Add it here!
prmkulk1978
prmkulk1978 Ace
Given :
λ1 = 87 cm = 0.87 m,
λ2 = 88.5 cm = 0.885 m
Beat frequency, N = 10 beats per second
: v1 = n1/ λ1 and v2 = n2/ λ2
∴ n1 = v /λ1 and n2 = v/ λ2
∵ λ2 > λ1 hence n1 > n2
∴ N = n1 – n2 = v/ λ1 – v /λ2
= v[ 1/0.87 – 1/0.885]
10=v[[ 1/0.87 – 1/0.885]
10=v[0.885-0.87/0.87x0.885]
V=10xx0.87x0.885/0.015
V=513.3m/s
∴Veloccity of sound=513.3m/s