Sound is a form of energy in that it consists fluctuations of air pressure . The speed of the fluctuations is measured in cycles per second or Hertz (HZ)
Intensity is how large the fluctuations are, also known as amplitude and for the sound the unit is decibels of sonic pressure level (dB SPL)
A good engineer will create an outline that meets the useful necessities of the venture and after that play out an anxiety examination to get certainty that the tower will be sheltered under the normal scope of working conditions. By then, the outline will be tastefully satisfying to engineers. On the off chance that the customer needs something all the more stylishly cleaned, he may need to utilize a plan authority. A designer who puts feel initially is taking a chance with his expert standing.
(a) 24.6 Nm
The torque produced by the net thrust about the center of the circle is given by:

where
F is the magnitude of the thrust
r is the radius of the wire
Here we have
F = 0.795 N
r = 30.9 m
Therefore, the torque produced is

(b) 
The equivalent of Newton's second law for a rotational motion is

where
is the torque
I is the moment of inertia
is the angular acceleration
If we consider the airplane as a point mass with mass m = 0.741 kg, then its moment of inertia is

And so we can solve the previous equation to find the angular acceleration:

(c) 
The linear acceleration (tangential acceleration) in a rotational motion is given by

where in this problem we have
is the angular acceleration
r = 30.9 m is the radius
Substituting the values, we find

Answer:
1) Time period
2) amplitude
3) Hertz or hz
4) Noise
5) frequency
6) infrasonic and ultrasonic
7) solid liquid and gas
8) A man
9) energy
10)1 vibration per minute