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PSYCHO15rus [73]

4 years ago

11

The density of gold and aluminum are the same. True False

1 answer:

Lana71 [14]4 years ago

3 0

This would be false.

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Under what circumstances will light display total internal reflection?

kumpel [21]

When light is passing from a denser medium to a lighter medium ( for example: from water to air)
<span> When the angle of refraction is greater than the critical angle( angle of incidence when the angle of refraction is perpendicular to the normal) of the denser medium.</span>

3 0

4 years ago

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What factors the weight of an object?

MAVERICK [17]

Answer:

Gravity

Explanation:

5 0

4 years ago

A sound wave produced by a clock chime is heard 400 m away 2.0 s later. The sound wave has a frequency of 512 Hz. What is its pe

emmasim [6.3K]

Answer:

$\frac{1}{512}$ seconds

Explanation:

T = 1 / f

where T is the period and f is frequency.

Here the frequency is 512 Hz.

<em>Using the formula:</em>

T = $\frac{1}{512}$ seconds

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3 years ago

A transmission channel is made up of three sections. The first section introduces a loss of 16dB, the second an amplification (o

AlekseyPX

Answer:

$P_{out} = 0.100 W = 100 mW$

Explanation:

The attached image shows the system expressed in the question.

We can define an expression for the system.

The equivalent equation for the system would be

$G_{total} = G_{1} + G_{2} + G_{3}\\G_{total} = -16dB+20dB-10 dB = -6 dB$

so, the input signal could be expressed in dB terms

$P_{in} [dB] = 10 log_{10}(P_{in}) \\P_{in} [dB] = 10 log_{10}(0.4)\\P_{in} [dB] = -3.97 dB$ (1)

so the output signal could be expressed as.

$P_{out} = P_{in} + G_{1} + G_{2} + G_{3}\\P_{out} = -3.97 dB - 6dB = -9.97 dB$

The gain should be expressed in dB terms and power in dBm terms so

$P_{out} = -9.97 + 30 = 20.03 dBm$

using the (1) equation to find it in terms of Watts

$P_{out} = 0.100 W = 100 mW$

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4 years ago

Which correctly lists three main causes of deforestation?

ASHA 777 [7]

I think it’s A. Mining and logging are huge factors

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3 years ago

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