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3 years ago

Which would be the least effective medium for traveling sound waves? A) gas B) solid C) liquid D) vacuum

Physics

2 answers:

Delvig [45]3 years ago

7 0

Answer: The correct answer is vacuum.

Explanation:

Sound wave is a longitudinal wave in which the particles vibrate parallel to the direction of the motion of the wave. Sound wave consists of compression and rarefaction.

It needs a medium to travel. It can travel in solid, liquid and gas. It cannot travel in vacuum.

Denser the medium, more will be the speed of the wave.

Solid is more denser in comparison to liquid.

The speed of the sound in the solid medium is more in comparison to the liquid. The speed of the sound in liquid is more than the speed in the gas.

Therefore, vacuum is least effective medium for traveling sound waves.

babymother [125]3 years ago

6 0

Answer: vacuum

Explanation: because

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Find the magnitude of the emf induced in the rod when it is moving toward the right with a speed 7.50 m/s.

Flauer [41]

Answer:

3 volts

Explanation:

It is given that,

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Velocity of the conducting rod, v = 7.5 m/s

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3 years ago

Light of wavelength 645 nm is incident on a double slit. The angle between the central bright fringe and the second dark fringe

kumpel [21]

Answer:

Slit separation, $d=1.13\times 10^{-5}\ m$

Explanation:

It is given that,

Wavelength of light, $\lambda=645\ nm=645\times 10^{-9}\ m$

The angle between the central bright fringe and the second dark fringe, $\theta=4.9^{\circ}$

In case of double slits, the condition for dark fringe is given by :

$d\ sin\theta=(n-\dfrac{1}{2})\lambda$

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$d\ sin\theta=\dfrac{3}{2}\lambda$

$d=\dfrac{3\lambda}{2\ sin\theta}$

$d=\dfrac{3\times 645\times 10^{-9}}{2\ sin(4.9)}$

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3 years ago

Calculate change in height of a 2kg ball moving a speed of 10m/s up a frictionless ramp until it stops

Nataliya [291]

The change in the height of the object is 5.1 m.

<h3>Conservation of mechanical energy</h3>

The principle of conservation of mechanical energy states that the total energy of an isolated system is always conserved.

The change in the height of the object is calculated by applying the principle of conservation of mechanical energy as follows;

P.E = K.E

$mg \Delta h = \frac{1}{2} mv^2\\\\g \Delta h = \frac{1}{2}v^2\\\\\Delta h = \frac{v^2}{2g} \\\\\Delta h = \frac{(10)^2}{2(9.8)} \\\\\Delta h = 5.1 \ m$

Thus, the change in the height of the object is 5.1 m.

Learn more about conservation of mechanical energy here: brainly.com/question/6852965

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2 years ago