Which phenomenon occurs when an object absorbs wave energy that matches the object's natural frequency?
2 answers:
When object absorbs energy then due to this energy it will have increase in it natural frequency
This increase in natural frequency will lead it to the increase in the amplitude of the object
Now when natural frequency of the object will match with the frequency of the wave that is absorbed by the object then this phenomenon is known as Resonance.
In resonance the amplitude of object will rise high and it will reach to its maximum limit.
so at condition
then in this condition it is known as resonance
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Answer:
2.06 m³/s
Explanation:
diameter of pipe, d = 0.81 m
diameter of constriction, d' = 0.486 m
radius, r = 0.405 m
r' = 0.243 m
density of oil, ρ = 821 kg/m³
Pressure in the pipe, P = 7970 N/m²
Pressure at the constriction, P' = 5977.5 N/m²
Let v and v' is the velocity of fluid in the pipe and at the constriction.
By use of the equation of continuity
A x v = A' x v'
r² x v = r'² x v'
0.405 x 0.405 x v = 0.243 x 0.243 x v'
v = 0.36 v' .... (1)
Use of Bernoulli's theorem
7970 + 0.5 x 821 x 0.36 x 0.36 x v'² = 5977.5 + 0.5 x 821 x v'² from (i)
1992.5 = 357.3 v'²
v' = 5.58 m/s
v = 0.36 x 5.58
v = 2 m/s
Rate of flow = A x v = 3.14 x 0.405 x 0.405 x 2 x 2 = 2.06 m³/s
Thus the rate of flow of volume is 2.06 m³/s.