Answer:
The roof and walls of the auditorium or cinema hall are generally covered with sound absorbent materials like draperies or compressed fibreboard to reduce reverberation. These materials reduce the formation of echoes by absorbing sound waves.
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Answer:
W= 565.42 J
Explanation:
Given that
mass , m =20.5 kg
displacement = 5.93 m
Applied force ,F= 95.3501 N
Coefficient of friction ,μ = 0.389
We know that work done by force F is given as
W= F .d
d=Displacement
F=Force
W=Work
W= 95.3501 x 5.93 J
W= 565.42 J
Therefore the work done by applied force will be 565.42 J.
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Answer:
Acceleration is considered to describe an increase or positive change of speed or velocity. On the other hand, deceleration is considered to describe a decrease or negative change of speed or velocity.
Answer:
176.9N
Explanation:
The following data were given
wire length,L=37cm=0.37m
linear density=18g/m
tube length,=192cm=1.92m,
speed of sound,v=343m/s
Since it is an open-closed tube, the second harmonic frequency is expressed as
The relationship between the tension, linear density and second harmonic frequency is expressed as