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3 years ago

Which inventor created a delivery system for electricity that was deemed safer than Thomas Edison's system?

2 answers:

5 0

c. George Westinghouse is the inventor who created a delivery system for electricity that was deemed safer than Thomas Edison's system.

SVETLANKA909090 [29]3 years ago

4 0

<h3><u>Answer;</u></h3>

C. George Westinghouse

<h3><u>Explanation;</u></h3>

<em><u>George Westinghouse was an inventor who is significant in promoting the use of electricity for power and transportation. He created the first large system to supply electricity for multiple uses.</u></em>
<em><u>He formed the Westinghouse electric and manufacturing company in 1884. He created delivery system for electricity that was deemed safer than that of Thomas Edison. </u></em>
He also developed a transformer that could bring alternating current electricity down form high voltage to low and hence making it possible to transmit it for long distances while making it ready for use.

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A sound is recorded at 19 decibels. What is the intensity of the sound?

sp2606 [1]

$1 \times 10^{-10.1} \mathrm{Wm}^{-2}$ is the intensity of the sound.

Answer: Option B

<u>Explanation:</u>

The range of sound intensity that people can recognize is so large (including 13 magnitude levels). The intensity of the weakest audible noise is called the hearing threshold. (intensity about $1 \times 10^{-12} \mathrm{Wm}^{-2}$ ). Because it is difficult to imagine numbers in such a large range, it is advisable to use a scale from 0 to 100.

This is the goal of the decibel scale (dB). Because logarithm has the property of recording a large number and returning a small number, the dB scale is based on a logarithmic scale. The scale is defined so that the hearing threshold has intensity level of sound as 0.

$\text { Intensity }(d B)=(10 d B) \times \log _{10}\left(\frac{I}{I_{0}}\right)$

Where,

I = Intensity of the sound produced

$I_{0}$ = Standard Intensity of sound of 60 decibels = $1 \times 10^{-12} \mathrm{Wm}^{-2}$

So for 19 decibels, determine I as follows,

$19 d B=(10 d B) \times \log _{10}\left(\frac{I}{1 \times 10^{-12} W m^{-2}}\right)$

$\log _{10}\left(\frac{1}{1 \times 10^{-12} \mathrm{Wm}^{-2}}\right)=\frac{19}{10}$

$\log _{10}\left(\frac{1}{1 \times 10^{-12} \mathrm{Wm}^{-2}}\right)=1.9$

When log goes to other side, express in 10 to the power of that side value,

$\left(\frac{I}{1 \times 10^{-12} W m^{-2}}\right)=10^{1.9}$

$I=1 \times 10^{-12} \mathrm{Wm}^{-2} \times 10^{1.9}=1 \times 10^{-12-1.9}=1 \times 10^{-10.1} \mathrm{Wm}^{-2}$

5 0

3 years ago

a truck drives up a hill with a 15 incline. if the truck has a constant speed of 22m/s, what are the horizontal and vertical com

Kamila [148]

Answer:

speed of truck (v) = 22 m/s ,

angle of hill (Θ) =15°

Find

Vertical component (Fv) = ?

Harizontal component (Fh) =?

Vertical component (Fh) = V cosΘ

= 22. cos 15

= 21.25 m/s.

Harizontal component (Fv) = V sinΘ

= 22. sin 15

= 5.69 m/s.

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. What will happen if there is an oil spill in the Arctic Ocean based on the statements above? A) The Atlantic and Southern Ocea

Daniel [21]

Answer: a

Explanation:

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In tokyo ghoul book 2 who is the main character and who taught ken kaneki the kagune

Inessa05 [86]

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Explanation: if I'm wrong correct me and i'll do more research

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kykrilka [37]

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