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3 years ago

When traveling from air to a solid, what would you expect a sound wave to do?

Physics

2 answers:

sdas [7]3 years ago

8 0

A. Speed up is the answer. Hope it is right.

ANTONII [103]3 years ago

3 0

Answer: The correct option is A.

Explanation:

Sound is a longitudinal wave. In longitudinal wave, the particles vibrate parallel to the direction of the propagation of the wave.

Sound wave consists of compression and rarefaction.

It needs medium to travel. It can travel in solid, liquid and gas. Denser the medium, more will be the speed of the sound.

Sound wave travels faster in solid in comparison to liquid.

In the given problem, when traveling from air to a solid then the speed of the sound wave will speed up.

Therefore, the correct answer is A.

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A uniform magnetic field passes through a horizontal circular wire loop at an angle 19.5 ∘ from the vertical. The magnitude of t

nlexa [21]

To solve this problem, we will apply the concepts related to Faraday's law that describes the behavior of the emf induced in the loop. Remember that this can be expressed as the product between the number of loops and the variation of the magnetic flux per unit of time. At the same time the magnetic flux through a loop of cross sectional area is,

$\Phi = BA Cos \theta$

Here,

$\theta$ = Angle between areal vector and magnetic field direction.

According to Faraday's law, induced emf in the loop is,

$\epsilon= -N \frac{d\Phi }{dt}$

$\epsilon = -N \frac{(BAcos\theta)}{dt}$

$\epsilon = -NAcos\theta \frac{dB}{dt}$

$\epsilon = -N\pi r^2 cos\theta \frac{d}{dt} ( ( 3.75 T ) + ( 3.05T/s ) t + ( -6.95 T/s^2 ) t^2)$

$\epsilon = -N\pi r^2 cos\theta( (3.05T/s)-(13.9T/s)t )$

At time $t = 5.71s$ , Induced emf is,

$\epsilon = -(1) \pi (0.220m)^2 cos(19.5\°)( (3.05T/s)-(13.9T/s)(5.71s))$

$\epsilon = 10.9V$

Therefore the magnitude of the induced emf is 10.9V

4 0

3 years ago

Read 2 more answers

What relationship do you see between a star colour and temperature

Andrei [34K]

Answer:

Stars emit colors of many different wavelengths, but the wavelength of light where a star's emission is concentrated is related to the star's temperature - the hotter the star, the more blue it is; the cooler the star, the more red it is

5 0

3 years ago

True or false: The therapeutic alliance is defined as the level of commitment a patient has to therapy.

Alik [6]

Answer:

False

Explanation:

it is indeed false

3 0

3 years ago

What pressure will be exerted by a 20 N box that has equal sides of 1 meter

Marina CMI [18]

It should be 20 Pa.

8 0

3 years ago

A person ran westward for 1600 meters in 8 minutes. What was their speed?

erica [24]

Answer:

3.33 m/s

Explanation:

1600 divided by 8 comes out to 200, so supposing we're measuring the speed in terms of Meters Per Second, we would need to divide 200 by 60 to take account of the individual seconds as opposed to simply 200 meters per minute.

3 0

3 years ago