Set it up as a direct proportion:
2.0lb/9hb = x/100hb
solve x (100hb •2.0lb)/9hb = 22.2lb
22.2lbs
I = pressure amplitude given = 0.2 W/m²
dB = decibel reading
decibel reading from the pressure amplitude is given as
dB = 10 log₁₀ (I/10⁻¹²)
inserting the values in the above equation
dB = 10 log₁₀ (0.2/10⁻¹²)
dB = 10 log₁₀ (2 x 10⁻¹/10⁻¹²)
dB = 10 log₁₀ (2 x 10⁻¹.10¹²)
dB = 10 log₁₀ (2 x 10¹²⁻¹)
dB = 10 log₁₀ (2 x 10¹¹)
dB = 113.01 db
hence the decibel reading comes out to be 113.01 db
The no of electron passing through the circuit is current by time. The no of electron passing are 46.63 x 10¹⁹ electrons.
<h3>What is charge?</h3>
The charge is the physical quantity which attracts or repels another object when comes into its field.
The time 3 min has 3 x 60 =180 seconds.
Total Charge Q = current I x time t
Q = 0.415 x 180
Q =74.7 coulombs
The no of electrons is the ratio of total charge divided by the fundamental charge.
n = 74.7/ 1.602 × 10⁻¹⁹
n= 46.63 x 10¹⁹ electrons
Thus, electrons pass a given point in the circuit in 3 min are 46.63 x 10¹⁹ .
Learn more about charge.
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D make one revolution around the sun hope this helps
