题目
题目

MUF0122 Physics Unit 2 - Semester 2, 2025

数值题

A sound source emits a sound wave with a power of 388.1 watts. Calculate the sound intensity at a distance of 9 meters from the source.Give your answer in Wm−2 using standard form to 2 decimal places in the following format without units:[math: 1.22×10−4] 1.22 \times 10^{-4} should be written as [ 1.22e-4 ]

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标准答案
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思路分析
We start with the formula for sound intensity from a point source: I = P / (4πr^2). The given power is P = 388.1 W and the distance is r = 9 m. First compute r^2: 9^2 = 81......Login to view full explanation

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