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Bongisa Mahlangu

Bongisa M.

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INSTANT ANSWER

448, At a conaly fair these is a berting, game tho imolves s spiunieg u/red. As the dr swing shows, the whed is set ima retsiocsl mojos with the beginfring of the anpular sectices lahslet "1" a the: mokn at the lep of the whicel. The whed then docelerates iod exerrually comes \( \mathrm{m} \) a hall \( x \) oce of the numbers scelima. The whes in ths drweiles is dividst inlo 12 secliuss, each of which is in andle of 3015 . Das mirs:

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INSTANT ANSWER

A speaker generates a contimoous tone of \( 440 \mathrm{~Hz} \). In the dring, sound travels ims 2 tube that splits into ruo segments, one lnoger than the ochter. The sound waves recomhine follare being detected by a micragsiune. The lengths of the two parhs fer wral trawl if the uaves arrive exactly out of plase at the wicroplisuc.

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BEST MATCH

Prave: \[ \frac{\arg (21)}{\arg (23)}=-\arg (20-\arg (22) \]

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