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3 years ago

11

What is necessary for the production and transmission of sound?

1 answer:

Setler79 [48]3 years ago

6 0

Vibration of a certain medium is necessary for the production of sound. For example vibratuon in the guitar's strings, vibration in vocal chord (when humans are speaking) etc etc.
Sound energy is the form of waves. Thus it requires a specific media to transmit itself. For instance sound travels fastest in solids. Sound also travels in liquids and air (gases). However, if there is no medium present. Sound will not travel.
Hope you get the answer :)

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Tamiku [17]

Answer:

$7.0\cdot 10^{-13}C$

Explanation:

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

where

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q1 and q2 are the two charges

r is the separation between the two charges

The force is attractive if the charges have opposite sign and repulsive if the charges have same sign.

In this problem, we have:

$r=0.070 cm =7\cdot 10^{-4} m$ is the distance between the charges

$q_1=q_2=q$ since the charges are identical

$F=9.0\cdot 10^{-9}N$ is the force between the charges

Re-arranging the equation and solving for q, we find the charge on each drop:

$F=\frac{kq^2}{r^2}\\q=\sqrt{\frac{Fr^2}{k}}=\sqrt{\frac{(9.0\cdot 10^{-9})(7\cdot 10^{-4})^2}{8.99\cdot 10^9}}=7.0\cdot 10^{-13}C$

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3 years ago

Which statement below is false? A) Weight depends on the force of gravity.

Scilla [17]

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A 1.5-kg block slides at rest starts sliding down a snow-covered hill Point A, which has an altitude of 10 m. There is no fricti

damaskus [11]

Answer:

the speed of the block when it reaches point B is 14 m/s

Explanation:

Given that:

mass of the block slides = 1.5 - kg

height = 10 m

Force constant = 200 N/m

distance of rough surface patch = 20 m

coefficient of kinetic friction = 0.15

In order to determine the speed of the block when it reaches point B.

We consider the equation for the energy conservation in the system which can be represented by:

$\dfrac{1}{2}mv^2=mgh$

$\dfrac{1}{2}v^2=gh$

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$v=\sqrt{2 \times 9.8 \times 10$

$v=\sqrt{196$

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Thus; the speed of the block when it reaches point B is 14 m/s

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Mars2501 [29]

Answer:

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