How does an airbag help protect a passenger in a car accident?
2 answers:
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Answer:
10.85 kV
Explanation:
The maximum value of the emf (ε) produced can be calculated using Faraday's law equation:
(1)
<u>Where:</u>
N: is the turns of wire = 130 turns
Φ: is the magnetic flux = BAcos(θ)
B: is the magnetic field = 3.82 T
A: is the area of the coil = a*b = 0.746 m*0.249 m = 0.186 m²
θ: is the angle between the magnetic field lines and the normal to A = ωt = 2πft
f: is the frequency = 1120 rev/min = 18.7 rev/s
From equation (1) we have:
Therefore, the maximum value of the emf produced is 10.85 kV.
I hope it helps you!
Explanation:
In order to compute correctly the sum of the two terms, we have to rewrite one of them such that they have the same exponent.
The two terms are:
For instance, we can re-write the second term such as it also has a power . In order to do that, we have to move the decimal point one place to the left, therefore:
At this point, the two numbers have the same exponent, so we can just add them together by adding the bases and keeping the same exponent, -2: