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3 years ago

Why does sound travel faster in steel than it does wood?

Physics

2 answers:

sweet-ann [11.9K]3 years ago

5 0

Answer:

Sound travels faster in steel because it is denser than wood.

Explanation:

Because the molecules in steel are more compact that means it takes less time for vibrations to travel from one molecule to the next.

Advocard [28]3 years ago

3 0

Answer:

The speed of sound is through a solid is calculated using

$v=\sqrt{\frac{Y}{d}}$

where Y is the young Modulus and d is the density.

And no, the other answer is wrong. Density is only part of the reason why sound is faster through steel than wood, but the reason why sound through steel is faster is because steel has a higher young modulus (Y) value than wood.

Lead has a higher density than steel but is slower for sound to go through because lead has a lower Y value.

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A fixed system of charges exerts a force of magnitude 22 N on a 4.0 C charge. The 4.0 C charge is replaced with a 8.0 C charge.

Karo-lina-s [1.5K]

Answer:

44 N

Explanation:

The electrostatic forces between two charges is given by:

$F=k\frac{q_1 q_2}{r^2}$

where

k is the Coulomb's constant

q1 and q2 are the two charges

r is their separation

We notice that the force is directly proportional to the charges.

In this problem, initially we have a force of

F = 22 N

on a q2 = 4.0 C, exerted by a charge q1.

If the charge is doubled,

q2 = 8.0 C

This means that the force will also double, so it will be

$F=22 N \cdot 2 = 44 N$

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3 years ago

A 53.0 kg sled is sliding on snow with μk=0.110. how much friction force does it feel?

Anon25 [30]

Answer:

57N

Explanation:

$F_F = \mu F_N = \mu mg = 0.11 \times 53 kg \times 9,8 \frac{m}{s^{2} }$

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3 years ago

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Tems11 [23]

Well, the thing is: we don't really know, as we don't even know how many species there are on earth.

If we take a look at the estimates of <span>World Wide Fund for Nature, an organization that works toward combating species extinction, their estimates vary from 200 to 100 000 - but a probable number is 20 000 (d). </span>
<span />

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3 years ago

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cricket20 [7]

Answer:

Length of the pendulum will be 3.987 m

Explanation:

We have given time period of the pendulum T = 8 sec

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We know that time period of the simple pendulum is given by

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$l=3.987m$

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Arada [10]

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We have advanced technological advancement which is why there won't be many discoveries in such time span.

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2 years ago