Question 439: Waves

Question

Beats are produced by waves $$\mathrm{y_1=a\sin2000\pi t}$$ and $$\mathrm{y_2=a\sin2008\pi t}$$. The number of beats heard per second is

Accepted Answer

$$\begin{aligned} & \mathrm{y}_1=\mathrm{a} \sin 2000 \pi \mathrm{t} \ & 	herefore 2 \pi \mathrm{n}_1=2000 \pi \quad 	herefore \mathrm{n}_1=1000 \mathrm{~Hz}\end{aligned}$$
$$\begin{array}{ll}\mathrm{y}_2=\mathrm{a} \sin 2008 \pi \mathrm{t} & \ 	herefore 2 \pi \mathrm{n}_2=2008 \pi & 	herefore \mathrm{n}_2=1004 \mathrm{~Hz} \ 	herefore 	ext { Beat frequency } & =\mathrm{n}_2-\mathrm{n}_1 \ & =4 \mathrm{~Hz}\end{array}$$

Answer

4

Answer

1

Answer

zero

Answer

8

Waves

Beats are produced by waves $\mathrm{y_1=a\sin2000\pi t} and \mathrm{y_2=a\sin2008\pi t}$. The number of beats heard per second is

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