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A rifle is fired in a valley with parallel vertical walls. The echo from one wall is heard 1.0s after the rifle was fired. The
1. 3 answers
2. asked by Einstein
3. 4,878 views
A bat flying at 4.54 m/s emits a chirp at 115 kHz. If the pulse is reflected by a wall, what is the frequency (kHz) of the echo
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2. asked by Anonymous
3. 850 views
A boy stands between two vertical wall and fires a rifle. Under what condition will he hear a single echo from both walls?
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2. asked by Judith
3. 1,556 views
make an echo scene similiar to one from the Grich movie... you know, where he starts playing with the echo, then whispers to
1. 1 answer
2. 17 views
What does a higher amplitude in ultrasound imaging result in?Choose only ONE best answer. A Darker echo B Brighter echo C No
1. 1 answer
2. 59 views
5. You are hiking in a canyon and you notice an echo. You decide to let put a yell and notice it took 2 seconds before you heard
1. 1 answer
2. asked by Debra
3. 3,057 views
A hiker shouts towards a vertical cliff 465 m away. The echo is heard 2.75 s. later. The wavelength of the sound is 0.750 m.
1. 1 answer
2. asked by Joy
3. 857 views
An echo in Cowboys Stadium is heard after 2 seconds. How far is the person standing from the wall if the speed of sound is 340
1. 1 answer
2. asked by Mercedez
3. 498 views
What do hypoechoic structures produce on an ultrasound image?Choose only ONE best answer. A High amplitude echo B Low amplitude
1. 1 answer
2. 62 views
A hiker shouts toward a vertical cliff 633 m away. The echo is heard 4.0 s later. What is the speed of sound in air?Group of
1. 1 answer
2. 16 views