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Lelu [443]
3 years ago
9

A trumpet makes sound when the lips of the musician vibrate. True False

Physics
2 answers:
Allushta [10]3 years ago
4 0
I think is True! Is the best answer. Because the trumpet it make them sounds like the lips with the musician and it vibrate.
ale4655 [162]3 years ago
4 0
I just asked my mom because she was in music school and she said it would be false
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What is the peak emf generated by a 0.250 m radius, 500-turn coil is rotated one-fourth of a revolution in 4.17 ms, originally h
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Complete question:

What is the peak emf generated by a 0.250 m radius, 500-turn coil is rotated one-fourth of a revolution in 4.17 ms, originally having its plane perpendicular to a uniform magnetic field 0.425 T. (This is 60 rev/s.)

Answer:

The peak emf generated by the coil is 15.721 kV

Explanation:

Given;

Radius of coil, r = 0.250 m

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magnetic field strength, B = 0.425 T

Induced peak emf = NABω

where;

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A = πr²

ω is angular velocity

ω = π/2t = (π) /(2 x 4.17 x 10⁻³) = 376.738 rad/s =  60 rev/s

Induced peak emf = NABω

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