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Citrus2011 [14]
3 years ago
8

Which of these is an example of a mechanical wave? sunlight light from a flashlight microwaves used to heat food police siren

Physics
2 answers:
harina [27]3 years ago
6 0
Police siren is the correct answer. Hope this helps.
Tom [10]3 years ago
3 0

The answer is Police siren

Explanation

The police siren is and exsample of a sound wave, a sound wave is mechanical because it needs a medium to transfer energy. therefore the siren is a mechanical wave

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The question is incomplete. I can help you by adding the information missing. They want you to calculate a) the radius of the cyclotron orbit for an electron with speed 1.0 * 10^6 m/s^2 and b) the radius of a cyclotron orbit for a proton with speed 5.0 * 10^4 m/s.

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a)

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Centripetal force, F = m*Ac = m * v^2 / R

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=> R = (9.11 * 10^31 kg) (1.0*10^6m/s) / [ (1.6 * 10^-19C)* (5.0 * 10^-5T) ]

=> R = 0.114 m

b) The equations are the same, just now use the speed, charge and mass of the proton instead of those of the electron.

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( sorry if that doesn't make sense )
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