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3 years ago

Select the correct answer.

Physics

2 answers:

viva [34]3 years ago

8 0

The correct answer is B

natali 33 [55]3 years ago

4 0

The wave speed completely depends on the characteristics and properties of the medium . . . physical properties for mechanical waves, electrical properties for electromagnedtic waves.

So if you want to change the speed of a wave, you have to change the medium . . . shoot it through some different kind of stuff. (B)

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erastovalidia [21]

Answer:

Explanation:

To solve the problem it is necessary to apply the concepts of Destructive and constructive interference. The constructive interference in tin film is given by

$2t = (m+\frac{1}{2})\frac{\lambda}{n}$

Where,

t = thickness

$\lambda=$ Wavelenght

m= is an integer

n= film/refractive index

We use this equaton because phase change is only present for gasoline air interface, but not at the gasoline-water interface. The minimum t only would be when the value of m=0 then

$2nt = \frac{\lambda}{2}$

$t = \frac{560nm}{4*1-4}$

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Therefore the correct answer is D. The minimum thickness of the film to see ab right reflection is 100nm

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3 years ago

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djyliett [7]

The cells in your body help get oxygen to cellular respiration.

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3 years ago

11. A plow pushes 100 kg of snow with 300 N of force. How much is the pile of snow accelerated?

Fed [463]

Answer:

Explanation:

This is an application of Newton's second Law.

Formula

F = m * a

F = 300 N

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a = ?

F = m * a

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2 years ago

What is the net force acting on the buggy. ?The net force is pointing to the ?

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Answer: 390, right

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Answer:

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Explanation:

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2 years ago