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3 years ago

9

Which of the following describes sound waves

2 answers:

morpeh [17]3 years ago

3 0

Answer:

your answer would be D because the waves results from back n forth vibrations of the particles of the medium throught which the sound waves is moving .

Svetllana [295]3 years ago

3 0

Answer:

D. Waves that require a medium and in which the vibrations are parallel to the motion of the sound

Explanation:

Ap3x

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At what wavelength would a star radiate the greatest amount of energy if the star has a surface temperature of 60,000 K?

kompoz [17]

Answer:

$\lambda=4.81\times 10^{-8}\ m$

Explanation:

We have,

The surface temperature of the star is 60,000 K

It is required to find the wavelength of a star that radiated greatest amount of energy. Wein's displacement law gives the relation between wavelength and temperature such that :

$\lambda T=2.89\times 10^{-3}$

Here,

$\lambda$ = wavelength

$\lambda=\dfrac{2.89\times 10^{-3}}{60000}\\\\\lambda=4.81\times 10^{-8}\ m$

So, the wavelength of the star is $4.81\times 10^{-8}\ m$ .

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grigory [225]

With its apparent magnitude

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3 years ago

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At a depth of 10.9 km, the Challenger Deep in the Marianas Trench of the Pacific Ocean is the deepest site in any ocean. Yet, in

bearhunter [10]

Answer:

$P = 1.09 \times 10^8 Pa$

Explanation:

As we know that the pressure inside the liquid level is given as

$P = \rho g h + P_o$

here we have

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h = 10.9 km

also we know that

$P_o = 1.01 \times 10^5 Pa$

now we have

$P = (1.01 \times 10^5) + (1024)(9.81)(10.9 \times 10^3)$

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3 years ago

6. A person lifts a package weighing 75 N. If she lifts it 1.2 m off the floor,

balandron [24]

Answer:

90 Joules

Explanation:

75×1.2=90.

i believe it is this

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melisa1 [442]

Answer:

H

Explanation:

I think it's H hope that helps

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2 years ago