A sound wave traveling downward with a speed of about 4,000 m/s suddenly slows to 1,500 m/s not far below the earth’s surface. w
2 answers:
speed of sound wave depends on elasticity of medium and density of medium
it is given by formula
now if wave travel through solid then its speed is maximum while if it travel from gas then its speed is minimum
so initially its speed is given as 4000 m/s and suddenly decrease to 1500 m/s
so here we can say that its medium will change from solid to liquid
<em>so sound will encounter with water </em>
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Answer:
a)
The velocity increase by a factor of
b)
The velocity decrease by a factor of 2.
c)
The velocity increase by a factor of 2
d)
The velocity not changes.
Explanation:
For this case we know that the velocity is
represent the final velocity after the changes specified,
Part a
The formula for the speed of a wave in a string is given by:
And the linear density is defined as:
And if we replace this we got:
If the tension mass is doubled we have this:
The velocity increase by a factor of
Part b
If we mass is quadrupled we have this:
The velocity decrease by a factor of 2.
Part c
If the length is quadrupled we have this:
The velocity increase by a factor of 2
Part d
For this case we know that the mass and the length are both quadrupled and we got:
The velocity not changes.