Question

PLEASE HELP ME!!!! I'LL MARK YOU BRAINLIEST IF YOU ANSWER THIS CORRECTLY!!!!! I NEED THESE DONE TODAY!!!!

Answer 1

Answer:

1)

TRUE

2)

TRUE

3)

TRUE

4)

$\lambda = 0.773 m$

5)

v = 100 m/s

Explanation:

1)

As we know by the formula of speed of sound we have

$v = 332 + 0.6 t$

$t = 20 deg C$

$v = 332 + (0.6 \times 20)$

$v = 332 + 12 = 344 m/s$

So approx speed of the sound is nearly 340 m/s

so its TRUE

2)

Wave speed is given as

$v = \frac{\lambda}{T}$

so it is given as

$v = f \lambda$

TRUE

3)

$f = \frac{1}{T}$

so from above equation we have

$v = f \times \lambda$

$v = \frac{\lambda}{T}$

4)

Wavelength is given as

$\lambda = \frac{v}{f}$

$\lambda = \frac{340}{440}$

$\lambda = 0.773 m$

5)

As we know that

$f = 50 Hz$

$\lambda = 2.0 m$

so we will have

$v = \lambda f$

$v = 50 \times 2$

$v = 100 m/s$