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NARA [144]
3 years ago
15

An amplifier has a 50 watt output and a 5 watt input. what is the gain in decibels for this amplifier, rounded to the nearest de

cibel?
Physics
1 answer:
Marrrta [24]3 years ago
6 0
Gain in decibels is given by;

Gain db = 10*log (Po/Pi), where Po = Power output, Pin = Power input

Substituting;

Gain in db = 10 * log (50/5) = 10 db
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The speed of sound in air is 345 m/s. A tuning fork vibrates above the open end of a sound resonance tube. If sound waves have w
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To develop this problem it is necessary to apply the concept of Frequency based on speed and wavelength.

According to the definition the frequency can be expressed as

f = \frac{v}{\lambda}

Where,

v = Velocity

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Our value are given by,

v = 345m/s

\lambda = 63cm

Replacing

f = \frac{345}{0.63}

f = 547.61Hz

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3 years ago
A train crosses a bridge that is 1300 m long in 1 minute and 5 seconds.
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Answer:

I'm pretty sure it's 20m/s because 1300m divided by 65 seconds is 20 so I think it's 20m/s

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3 years ago
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3 years ago
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Explain why the "X" chromosome expresses more traits than the "y" chromosome.
wel

Explanation:

The X chromosome (females have 2 of them while males have 1) is five times larger than the Y chromosome and has 10 times the number of genes.

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What is the mechanical advantage of the wheel and axle shown below?
BigorU [14]

The correct answer is A. 32.5

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Mechanical advantage of a wheel and axle is calculated by dividing the radius of the wheel by that of the axle.

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Substituting for the values in the question gives:

MA=26cm/0.8cm

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