lecture3_tu1_19 - Clicker question Speed of sound Could a...

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Could a dog hear a volcano before people do? A. Yes B. No Answer: it depends. If the sound from the eruption occurs at one time only, then no, because all frequencies travel at the same speed. Speed of sound Clicker question
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EVERY CLASS - we must set the frequency! (leave it on for the rest of class!) 1) Press and HOLD power on, till blue light flashes. 2) Key in BA (OUR code, all term) 3) Brief green vote-Status light confirms it worked! (Blue light steady) If you turn it off, (or come to class late) you can do the above any time while I’m COLLECTING VOTES. If you click and don’t see green flash (or blue is flashing) try above, again!
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