The best statement would be number 3. Sound waves move perpendicular to the medium particles.
A=mgh
m=300g=0.3kg
g=9,81 m/s^2
h=10m
A=29.43J
The same amount of work being done over a long period of time!
Answer:
So percentage error will be 2 %
Explanation:
We have given initial value of acceleration due to gravity 
And final value of acceleration due to gravity 
We have to find the percentage error
We know that percentage error is given by 
So
%