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Worksheets8A TA 1920 (Sound)
Total questions: 10
Worksheet time: 14mins
Choose three conditions so the sound can be heard!
There is a source
There is a sound source
There is a medium / intermediary substances
There is a receiver/listener
The speed of sound is influenced by two things namely .... and...
The shape of medium
The humidity
The type of medium
The temperature
Choose the frequency limit for human hearing!
What is the name of this limit called?
< 20 Hz, Infrasonic
20 - 20.000; Infrasonic
20 - 20.000; Audiosonic
>20.000; Ultrasonic
The greater the sound frequency the tone will be ....... The smaller the amplitude the tone will be .... (must in order)
higher, strong
higher, weak
smaller, weak
higher, weak
Resonance occurs because .....
Resonance occurs because of the lower frequency
Resonance occurs because of the same amplitude
Resonance occurs because of the lower amplitude
Resonance occurs because of the same frequency
An echo in a room can be avoided except by ...
applying sound mufflers to the room which is made of foam rubber
applying sound mufflers to the room which is made of thick cardboard
applying sound mufflers to the room which is made of carpet
applying sound mufflers to the room which is made of hard materials
Tuliskan setidaknya 3 aplikasi / manfaat suara ultrasonik dalam teknologi! (Choose 3 answers)
Ultrasonografi (USG)
Sonifikasi
Terapi Son
Sonar
From the surface of the sea water, sound signals are sent to the sea floor. The signal is received again after 12 s. If the speed of sound in water is 1800 m/s. Determine the depth of the sea!
108 m
1.080 m
10.800 m
108.00 m
The depth of the sea somewhere is 450 m. The vibration sent by the ship to the seabed is reflected in 0.9 s. Determine the speed of sound in sea water!
1 m
10 m
100 m
1000 m
Toni shouted near the cliff. The reverberation was heard by him 1.2s later. If the speed of sound at that time 340 m/s. Determine the distance of the cliff to Toni!
20,4 m
204 m
2.040 m
20.400 m
