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3 years ago

11

A whistle of frequency 516 Hz moves in a circle of radius 64.3 cm at an angular speed of 17.9 rad/s. What are (a) the lowest and

(b) the highest frequencies heard by a listener a long distance away, at rest with respect to the center of the circle

1 answer:

Arisa [49]3 years ago

5 0

Answer:

(a) 498.6 Hz

(b) 534.6 Hz

Explanation: Please see the attachments below

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Lasers are now used in eye surgery. Given the wavelength of a certain laser is 514 nm and the power of the laser is 1.1 W, how m

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After, you do the inverse of the energy per phothon and as a result, you will have the number of photons in a Joule of energy:

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And by doing a simple rule of three, if $2.844*10^{18} photons$ are released every second, then in 0.056 s:

$0.056 s*2.844*10^{18} \frac{photons}{s} = 1.593*10^{17} photons$ are released during the surgery

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