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- 1. Multiple Choice
What type of wave are sound wave?
longitudinal
transverse
electromagnetic
sea wave
- 2. Multiple Choice
In which medium sound can't travel?
solid
liquid
gas
vacuum
- 3. Multiple Choice
What is an echo
deflected sound
refracted sound
reflected sound
diffracted sound
- 4. Multiple Choice
In which medium speed of sound are fastest?
vacuum
solid
liquid
gas
- 5. Multiple Choice
What is the range of frequencies audible to the human ear
lower than 20 Hz
20 Hz - 20.000 Hz
higher than 20.000 Hz
0 Hz - infinite Hz
- 6. Multiple Choice
What is ultrasound?
Sound with a frequency higher than 20.000 Hz
Sound with a frequency lower than 20 Hz
Sound with a frequency 20 Hz
sound with a frequency 20.000 Hz
- 7. Multiple Choice
look at the picture. There are 4 sound wave with different amplitude and wavelength. Which sound wave has loudest sound?
A
B
C
D
- 8. Multiple Choice
look at the picture. There are 4 sound wave with different amplitude and wavelength. Which sound wave has highest pitch?
A
B
C
D
- 9. Multiple Choice
The delay time between light of thunder and sound of thunder is 2 seconds. If the speed of sound at the air is 340 m/s, how far the thunder from you?
680 m
170 m
342 m
338 m
- 10. Multiple Choice
A boat is using echo-sounding equipment to measure the depth of the water underneath.
The equipment in the boat sends a short pulse of sound downwards and detect the echo after a time interval 4 seconds. The speed of sound in water is 1500 m/s. Calculate the depth of water!
6000 m
5800 m
3000 m
2600 m
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