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swim": 2 ' mohenloel thieves and Bound 1. A student slanting near a brick wel claps her hands and hears the echo 0.250 a later. If the speed of somd was 340.0 mm. how for from the wall was site? 2. How much taster does sound travel on a hot summer day. 40 '0. than on the coldest winter day, 40 \"C? 3. A person with their head sideways in the water sees a beaver slap its tail on the lake striaoe 1-2 km away. What Is the time dll'lerenoe between the sound heard in the ear listening in the air and the ear hearing the sound transmitted through the water? The speed of sound in water is 1 498 We and the air temperature is 30 \"C. 4. A guitar emits a 440 Hz tone. How far apart are the dress in room temperature air (20 '0]? How long does it take the string to vibrate from crest position to trough position {stress huloe the amplitude)? 5. A person is listening to a new instrument capable of sounds ranging from 10 dB to 150 dB and with irreguendes from 12 Hz to 30 000 Hz. Comment on the suitability of this instrument for \"the musician or audience. I 6. A police ofcer with an exceptionally good ear hears an approaching motorcycle. The engine sound he hears as the bike approaches is 195 Hz. (a) Is the actual sound the bike makes higher or lower in pitch? to) What causes this frequency shift? indicate with a diagram. oi Then after the hike passes he hears 147 Hz as the perceived pitch. it it was a mic sunny 20 \"C day. how last was the bike moving