If the wave passes the putrefying pile of a poached pickerel in 0.5 seconds, then the wave has a period of 0.5s.
But we say that if F=1/T,
where F⇒frequency,
T⇒period.
F=1/0.5
= 2Hz
velocity of the wave = distance/time taken
= (20÷100)/0.5
= 0.2÷0.5
= 2/5
Now form the wave equation,
V=λF
Where V ⇒ velocity of the wave.
λ⇒wavelength of the wave.
So, λ=V/F
λ = 2/5 ÷ 2
=2/5 ×1/2
= 2/10
=0.2 m
The wavelength in cm is, 0.2×100 = 20 cm.
All you would do is for a, 10 times 2 is 20 so it would be 20-dB
For b, 10 times 4 is 40 so it would be 40-dB
For c, 10 times 8 is 80 so it would be 80-dB
Answer:
16 degrees
Explanation:
The tipping point of the cabinet is sketched below.
