1. Anna uses a device to keep cats away from her garden - Edexcel - GCSE Physics - Question 1 - 2012 - Paper 1
Question 1
1. Anna uses a device to keep cats away from her garden.
This device emits some ultrasound waves that cats do not like.
(a) Which of these could be the frequency of... show full transcript
Worked Solution & Example Answer:1. Anna uses a device to keep cats away from her garden - Edexcel - GCSE Physics - Question 1 - 2012 - Paper 1
Step 1
Which of these could be the frequency of the ultrasound waves?
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The correct answer is A: 23 000 Hz. This frequency falls within the ultrasound range, which is above 20 000 Hz.
Step 2
State another use for ultrasound waves.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Another use for ultrasound waves is for medical scanning, such as in fetal ultrasounds or to shatter kidney stones.
