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4 years ago

10

In a sound wave, the magnitude of the compression is ___ the magnitude of the rarefaction.

2 answers:

Darina [25.2K]4 years ago

5 0

In a sound wave, the magnitude of the compression is ___ the magnitude of the rarefaction.

equal to

umka2103 [35]4 years ago

4 0

At first, I thought it depends on the waveform of the sound ... sine wave,
square wave, sawtooth wave, complex wave, etc. But the magnitude of
the compression must be equal to the magnitude of the rarefaction. It
it weren't, then air molecules would creep along the wave in the direction
of one or the other, and the wave would carry matter as well as energy ...
and we know that waves don't do that.

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The electric force between two charges A. increases with distance between the charges B. increases if either one of charges gets

beks73 [17]

Answer:

Option (A) , (b) and (d) are correct option

Explanation:

According to Coulomb's law electric force between two charges is given by

$F=\frac{1}{4\pi \epsilon _0}\frac{q_1q_2}{r^2}$

From the relation we can say that force is directly proportional to magnitude of charges and inversely proportional to distance between them '

So if we increase the distance then force will decrease

Increase if any of the charge get larger

If force is attractive then both the charge will be of different sign and is force is repulsive then both the charges of same sign

From above conclusion we can say that (a), (b) and (d) are correct option

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3 years ago

An object traveling 200 feet per second slows to 50 feet per second in 5 seconds. Calculate the acceleration of the object. Use

shtirl [24]

Answer:

-30m/s

Explanation:

Given:

Initial velocity of object = 200 feet/second

Final velocity of object = 50 feet/second

Time of travel = 5 seconds

To calculate acceleration of the object we will find the rate of change of velocity with respect to time.

So, acceleration "a" is given by:

$a=\frac{v_f-v_i}{t}$

where vf represents final velocity, vi represents initial velocity and is time of travel.

Plugging in values to evaluate acceleration.

$a=\frac{50-200}{5}$

$a=\frac{-150}{5}$

$a= -30m/s$

The acceleration of the object is -30m/s

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