Sonar is an example of ultrasound - Edexcel - GCSE Physics - Question 1 - 2018 - Paper 1
Question 1
Sonar is an example of ultrasound.
(a) State one other example of ultrasound.
(b) State an example of a use of infrasound.
A technician on a boat uses sonar pulse... show full transcript
Worked Solution & Example Answer:Sonar is an example of ultrasound - Edexcel - GCSE Physics - Question 1 - 2018 - Paper 1
Step 1
State one other example of ultrasound.
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Answer
An example of ultrasound is foetal scanning.
Step 2
State an example of a use of infrasound.
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An example of a use of infrasound is monitoring earthquakes.
Step 3
Calculate the total time of travel for the sonar pulse used to make this measurement.
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To calculate the total time of travel, we can use the formula:
t=vd
where:
t is the time in seconds,
d is the distance in meters,
v is the speed in meters per second.
The distance for the sonar pulse to travel to the seabed and back to the boat is double the distance from the shore:
Total distance d=2×120m=240m.
Using the speed of the sonar pulse, which is 1600 m/s:
t=1600m/s240m=0.15s
Therefore, the total time of travel for the sonar pulse is 0.15 seconds.
