It is known that at a distance of 1.5 metres from the siren, the sound intensity is 4 watts per square metre (Wm). (a) Show that I= [2] (b) Sketch the curve of / on the axes below showing clearly the point (1.5, 4). [2]
It is known that at a distance of 1.5 metres from the siren, the sound intensity is 4 watts per square metre (Wm). (a) Show that I= [2] (b) Sketch the curve of / on the axes below showing clearly the point (1.5, 4). [2]
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
Related questions
Question
![2221-7209
- 14 -
11. [Maximum mark 6)
Ifa shark is spotted near to Brighton beach, a lifequard will activate a siren to warn swimmers.
Siren
The sound intensity. I, of the siren varies inversely with the square of the distance, d, from
the siren, where d>0.
It is known that at a distance of 1.5 metres from the siren, the sound intensity is 4 watts per
square metre (Wm).
(a)
Show that I=-
[2]
(b)
Sketch the curve of / on the axes below showing clearly the point (1.5, 4).
[2]
1.
20-
-5-
(This question continues on the following page)
20EP14](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdf7c064b-a2d8-4c79-b34d-8abb1adec9ff%2F3de292a2-834d-4a8c-bc60-0b14322740bf%2F9v26rh_processed.jpeg&w=3840&q=75)
Transcribed Image Text:2221-7209
- 14 -
11. [Maximum mark 6)
Ifa shark is spotted near to Brighton beach, a lifequard will activate a siren to warn swimmers.
Siren
The sound intensity. I, of the siren varies inversely with the square of the distance, d, from
the siren, where d>0.
It is known that at a distance of 1.5 metres from the siren, the sound intensity is 4 watts per
square metre (Wm).
(a)
Show that I=-
[2]
(b)
Sketch the curve of / on the axes below showing clearly the point (1.5, 4).
[2]
1.
20-
-5-
(This question continues on the following page)
20EP14
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