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3 years ago

Why do we balance chemical equations

Physics

1 answer:

antiseptic1488 [7]3 years ago

5 0

So it could follow the correct mass for the atom

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Which statements describe a closed circuit? Check all that apply. Bulbs will shine. Bulbs will not shine. The circuit is incompl

vaieri [72.5K]

Bulbs will shine.

The circuit is complete.

Charges flow.

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3 years ago

Read 2 more answers

Sound wave frequency difference

motikmotik

Are u trying to ask what the difference between a sound wave and a frequency is?

6 0

3 years ago

To which layer can geologists apply the principle of faunal succession to determine the age of the layer?

BigorU [14]

A. Layer C is the right answer out of all the choices

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4 years ago

Four bicyclists travel different distances and times along a straight path. Which cyclist traveled with the greatest average

riadik2000 [5.3K]

Answer:

The cyclist with the greatest average speed is Cyclist 4 with average speed of 4.5 m/s

Explanation:

Given;

Cyclist 1 travels 9 m in 27 s

Cyclist 2 travels 87 m in 22 s

Cyclist 3 travels 106 m in 26 s

Cyclist 4 travels 108 m in 24 s

Determine the average speed of the cyclists as follows;

Average speed of Cyclist 1: v = 9/27 = 0.33 m/s

Average speed of Cyclist 2: v = 87/22 = 3.96 m/s

Average speed of Cyclist 3: v = 106/26 = 4.08 m/s

Average speed of Cyclist 4: v = 108/24 = 4.5 m/s

Therefore, the cyclist with the greatest average speed is Cyclist 4 with average speed of 4.5 m/s

6 0

4 years ago

The human ear canal is about 2.9 cm long and can be regarded as a tube open at one end and closed at the eardrum. What is the fu

solniwko [45]

The frequency of the human ear canal is 2.92 kHz.

Explanation:

As the ear canal is like a tube with open at one end, the wavelength of sound passing through this tube will propagate 4 times its length of the tube. So wavelength of the sound wave will be equal to four times the length of the tube. Then the frequency can be easily determined by finding the ratio of velocity of sound to wavelength. As the velocity of sound is given as 339 m/s, then the wavelength of the sound wave propagating through the ear canal is

Wavelength=4*Length of the ear canal

As length of the ear canal is given as 2.9 cm, it should be converted into meter as follows:

$wavelength = 4*2.9*10^{-2} =0.116$

Then the frequency is determined as

f=c/λ=339/0.116=2922 Hz=2.92 kHz.

So, the frequency of the human ear canal is 2.92 kHz.

4 0

3 years ago