A violin string vibrates at a fundamental frequency of 200 Hz. The frequency of the third harmonic for
this string is:
300 hertz.
400 hertz.
500 hertz.
600 hertz.
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answer seismograph;

sup bro, im dumb, but this is what i found xd

"the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface"