Two pulses travelling on the same string are described by the equation y1=5(3x−4t)2+2 and y2=−5(3x+4t−6)2+2. With respect to these string waves, mark the correct statements:

At t = 3 4 ρ , y 1 + y 2 = 0 At x = 1 m , y 1 + y 2 = 0

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Two pulses travelling on the same string are described by the equation $y_{1} = \frac{5}{{(3 x - 4 t)}^{2} + 2}$ and $y_{2} = \frac{- 5}{{(3 x + 4 t - 6)}^{2} + 2}$ . With respect to these string waves, mark the correct statements:

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At $t = \frac{4}{3} s,$ the displacement of two waves cancel each other everywhere

At $x = 1 m,$ the displacement of two waves always cancel each other

The two waves move with equal velocity

At $t = \frac{3}{4} s,$ the displacement of two waves cancel each other everywhere

answer is B, C.

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At $t = \frac{3}{4} ρ,$ $y_{1} + y_{2} = 0$
At $x = 1 m,$ $y_{1} + y_{2} = 0$

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