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Law Incorporation [45]

3 years ago

13

Which type of wave experiences a change in speed when entering a new medium?

2 answers:

babymother [125]3 years ago

8 0

which type of wave experiences a change in speed when entering a new medium?

the Correct answer is

a)only sound waves

aliina [53]3 years ago

4 0

Both sound and light waves

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Irina finds an unlabeled box of fine needles, and wants to determine how thick they are. A standard ruler will not do the job, a

Vsevolod [243]

Answer:

$d=\frac{1.22\times 640\times 10^{-9}\times 21.7}{7.35\times 10^{-2}}=2305.21\times 10^{-7}m$

Explanation:

The expression which represent the first diffraction minima by a circular aperture is given by $d sin\Theta =1.22\lambda$ --------eqn 1

The angle through which the first minima is diffracted is given by $tan\Theta =\frac{y_1}{D}$ ---------eqn 2

As $\Theta$ is very small so we can write $sin\Theta =tan\Theta$

So from eqn 1 and eqn 2 we can write

$y_1=\frac{1.22\lambda D}{d}$ --------eqn 3

Here $y_1$ is the position of first maxima D is the distance of screen from the circular aperture d is the diameter of aperture

It is given that diameter of circular aperture is 14.7 cm so $y_1=\frac{14.7}{2}=7.35 \ cm$

Now putting all these value in eqn 3

$d=\frac{1.22\lambda D}{y_1}$

$d=\frac{1.22\times 640\times 10^{-9}\times 21.7}{7.35\times 10^{-2}}=2305.21\times 10^{-7}m$

8 0

3 years ago

What occurs when vibrations traveling through an object match the objects natural frequency

erik [133]

<span>the answer is - resonance

</span>

5 0

3 years ago

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Why are marble and granite used so often as a building materials?

Katyanochek1 [597]

Answer:

Granite is an excellent building material that provides some outstanding interior design opportunities whilst being incredibly sturdy and reliable. It has become one of the most popular building materials in modern construction, from kitchen surfaces through to paving slabs.You Can Expect Durability and Longevity. Firstly, marble is so popular around the world because of its durability in a wide variety of weather conditions. Structures that are over hundreds of years old made from marble are still standing to this day, and look as pristine as they day they were crafted.

Explanation:

3 0

3 years ago

Which of the following states that all matter tends to "warp" space in its vicinity and that objects react to this warping by ch

Natasha2012 [34]

There are no choices on the list you provided that make such a statement,
and it's difficult to understand what is meant by "the following".

That statement is one way to describe the approach to 'forces of gravity'
taken by the theory of Relativity.

4 0

4 years ago

I don't know the answer but I think that it is yes I just don't want to get it wrong

mrs_skeptik [129]

Yes your answer should be true.

8 0

3 years ago

Read 2 more answers