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3 years ago

A wave is passing through a uniform medium. As the frequency of this wave increases, its wavelength

Physics

2 answers:

pashok25 [27]3 years ago

7 0

<h2>Answer: decreases</h2>

The speed $v$ of a wave is given by the following formula:

$v=f.\lambda$ (1)

Where:

$f$ the frequency of the wave

$\lambda$ the wavelength

But, we want to know<u> its wavelength</u>, hence we have to rewrite equation (1):

$\lambda=\frac{v}{f}$ (2)

If we are told the wave is passing through a uniform medium, this means <u>its velocity is constant</u> in this medium.

So, keeping this in mind, from (2) we are able to know that $\lambda$ is inversely proportional to $f$ .

What does this mean?

If $f$ increases $\lambda$ decreases

and

If $f$ decreases $\lambda$ increases

Therefore the correct option is b:

<h2>As the frequency of this wave increases, its wavelength <u>decreases</u>.</h2><h2 />

Lerok [7]3 years ago

5 0

B. Decreases

Why: Because the longer the wavelength the lower the frquency. The shorter the wavelength the higher the frequency.

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asambeis [7]

Complete Question:

Check the file attached to get the complete question

Answer:

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Explanation:

In Claire's test, the weight of vehicle 1 is either equal to or greater than the weight of vehicle 2, so it was sufficient to push it down the cliff. In the film Ice word revenge, the weight of vehicle 1 is less than the weight of vehicle 2, it is not sufficient to make it fall off the cliff ( Note: Looking exactly the same in the movie, as Claire claimed, does not mean they have the same mass). Therefore if Claire wants a collision that will not make the vehicle 2 fall off the cliff, he should collide it with a vehicle of lesser mass/weight.

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3 years ago

A cart starts from rest and accelerates uniformly at 4.0 m/s2 for 5.0 s. It next maintains the velocity it has reached for 10 s.

wlad13 [49]

Answer:

12m/s

Explanation:

$v_f=v_o+at$

Let's call the velocity that the car maintains for 10 seconds $v_f_1$ , and the final velocity $v_f_2$ .

$v_f_1=0+(4)(5)=20m/s \\\\v_f_2=20+(-2)(4)=12m/s$

Hope this helps!

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3 years ago

What instrument measures air temperature?

zavuch27 [327]

Its a thermometer . i hope this helps you

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3 years ago

When you jump from an elevated position you usually bend your knees upon reaching the ground. By doing this, you make the time o

dsp73

Answer:

c. about 1/10 as great.

Explanation:

While jumping form a certain height when we bend our knees upon reaching the ground such that the time taken to come to complete rest is increased by 10 times then the impact force gets reduced to one-tenth of the initial value when we would not do so.

This is in accordance with the Newton's second law of motion which states that the rate of change in velocity is directly proportional to the force applied on the body.

Mathematically:

$F\propto\frac{d}{dt} (p)$