A travelling wave pulse is given by \( y=\frac{20}{4+(x+4 t)^{2}}(m...

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A travelling wave pulse is given by \( y=\frac{20}{4+(x+4 t)^{2}}(m) \), then
\( \mathrm{P} \)
W
(1) The pulse is travelling along negative \( x \) axis
(2) The speed of pulse is \( 4 \mathrm{~m} / \mathrm{s} \)
(3) The amplitude of pulse is \( 5 \mathrm{~m} \)
(4) All of these
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