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3 years ago

This is a wave whose energy travels in the same direction as the energy being transferred.

Physics

1 answer:

aksik [14]3 years ago

7 0

Answer:

LONGITUDINAL WAVE

Explanation:

As we know that there are two type of propagation of wave

1) Transverse wave :

in transverse nature of waves the energy is propagated into the medium in perpendicular to the wave propagation.

So here in transverse waves the medium molecules will start oscillating in perpendicular direction

2) Longitudinal wave

Here in this type of wave the medium molecules will start oscillating in the direction of propagation of waves. So here the medium molecules will oscillate in the direction parallel to the wave propagation

so correct answer is

Longitudinal waves

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A stationary police car emits a sound of frequency 1240 HzHz that bounces off of a car on the highway and returns with a frequen

lara [203]

Answer:

frequency = 1475.45 Hz

Explanation:

given data

frequency f1 = 1215 Hz,

frequency f2 = 1265 Hz

police car moving vp = 25.0 m/s

solution

speed of sound u = 343 m / s

speed of the other car = v

when the police car is stationary

the frequency the other car receives is

f2 = f1 × $\dfrac{u+v}{u}$ ................1

and

the frequency the police car receives is

f2 = f1 × $\dfrac{u}{u-v}$ ..................2

now from equation 1 and 2

$\frac{f2}{f1} = \dfrac{u+v}{u-v}$

$\frac{1275}{1240} = \frac{u+v}{u-v}$

$v =\frac{1275-1240}{1275+1240}\times 343$

v = 4.77 m/s

and

frequency the other car receives is

f2 = f1 × $\dfrac{u+v}{u-vp}$ ......................3

and

the frequency the police car receives is

f2 = f1 × $\dfrac{u+vp}{u - v}$ .......................4

now we get

f2 = f1 × $\dfrac{(u+v)(u + vp)}{(u-v)(u-vp)}$

f2 = $1240\times \frac{(343+4.77)(343+25)}{(343-4.77)(343-25)}$

f2 = 1475.45 Hz

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Answer:

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