IG Phy – Sound(II)
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Question 1 of 13
1. Question
1 point(s)An echo is a sound that has been reflected.
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Question 2 of 13
2. Question
1 point(s)For an echo to be clearly heard, the obstacle needs to be small compared with the wavelength of the sound.
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Question 3 of 13
3. Question
1 point(s)The speed of sound can be determined using the time taken for an echo to return.
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Question 4 of 13
4. Question
1 point(s)Ultrasound can travel through gases, liquids, and solids.
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Question 5 of 13
5. Question
1 point(s)The preferred frequency for ultrasound in water is about 50 kHz.
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Question 6 of 13
6. Question
1 point(s)Sonar is used to locate objects underwater using ultrasound.
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Question 7 of 13
7. Question
1 point(s)Ultrasound is absorbed more in water than in air.
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Question 8 of 13
8. Question
1 point(s)Medical ultrasound scans cannot detect soft tissues.
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Question 9 of 13
9. Question
1 point(s)A special gel is used in ultrasound scans to ensure good contact.
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Question 10 of 13
10. Question
1 point(s)Ultrasound can be used to detect cracks in building structures.
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Question 11 of 13
11. Question
1 point(s)The speed of sound in seawater is about 1500 m/s.
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Question 12 of 13
12. Question
1 point(s)Ultrasound cannot be used to determine the depth of an object underwater.
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Question 13 of 13
13. Question
1 point(s)Ultrasound scans can be used to detect eye issues.
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