4 years ago

Maria wants to solve the following system using the elimination method:

1 answer:

7 0

In order to eliminate the y terms, the y terms must be reciprocals.
The first equation has 9y.
To eliminate y, you need to add to it -9y.
The second equation has y. In order for the second equation to have -9y, you must multiply both sides of the second equation by -9.

Answer: D -9

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A 149-turn circular coil of radius 2.45 cm is immersed in a uniform magnetic field that is perpendicular to the plane of the coi

Dahasolnce [82]

Answer:

94.05 mV

Step-by-step explanation:

N = Number of turns = 149

r = Radius of coil = 2.45 cm = 0.0245 m

t = Time = 0.141 s

Initial magnetic field = 50.9 mT

Final magnetic field = 98.1 mT

A = Area = πr² = π×0.0245²

$\text{Induced emf}=NA\frac{dB}{dt}\\\Rightarrow \text{Induced emf}=149\times \pi \times 0.0245^2\frac{(98.1-50.9)\times 10^{-3}}{0.141}\\\Rightarrow \text{Induced emf}=0.09405 V = 94.05 mV$