The equation of a wave travelling on a string stretched along

Question:

The equation of a wave travelling on a string stretched along the $X$-axis is given by $\mathrm{Y}=\mathrm{A} . e^{-\left(\frac{x}{a}+\frac{t)^{2}}{T}\right.}$

(a) Write the dimensions of $A$, a and $T$.

(b) Find the wave speed

(c) In which direction is the wave travelling

(d) Where is the maximum of the pulse located at $t=T$ ? At $t=2 T$ ?

Solution:

at

$t=T ; x=-a$

$t=2 T ; x=-2 a$

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