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2 years ago

Brainliest need help

Engineering

1 answer:

insens350 [35]2 years ago

4 0

Answer:

answer c

Explanation:

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Find the phasor form of:

mixer [17]

Answer:

$I=24.598\angle 50.377$

Explanation:

A tension or current expressed in cosine form and with a positive sign can be converted directly into a phasor. This is done by indicating the tension and the offset angle:

$Acos(10\omega t +\phi)=A\angle \phi$

So:

$i(t)=10cos(10t+63)+15cos(10t-42)=10\angle 63 + 15\angle42=I$

You can sum the phasors simply using a calculator, however, let's do it manually:

Let's find the rectangular form of each phasor using the next formulas:

$A=\sqrt{a^2+b^2} \\\phi=arctan(\frac{b}{a})$

For $10\angle 63$

$63=arctan(\frac{b}{a} )\\\\tan(63)=\frac{b}{a} \\\\b=a*tan(63)$

$10=\sqrt{a^2+(a*tan(63))^2} \\\\10^2=a^2+a^2*(tan(63))^2\\\\Solving\hspace{3}for\hspace{3}a\\\\a=\sqrt{\frac{100}{1+tan(63)^2} } =4.539904997\\\\and\hspace{3}b\\b=\sqrt{100-a^2} =8.910065242$

So:

$Z_1=a+bj=4.539904997+8.910065242j$

For $15\angle 42$

$42=arctan(\frac{b_2}{a_2} )\\\\tan(42)=\frac{b_2}{a_2} \\\\b_2=a_2*tan(42)$

$15=\sqrt{a_2^2+(a_2*tan(42))^2} \\\\15^2=a_2^2+a_2^2*(tan(42))^2\\\\Solving\hspace{3}for\hspace{3}a_2\\\\a_2=\sqrt{\frac{225}{1+tan(42)^2} } =11.14717238\\\\and\hspace{3}b_2\\\\b_2=\sqrt{225-a^2} =10.0369591$

So:

$Z_2=a_2+b_2j=11.14717238+10.0369591j$

Hence:

$Z_T=Z_1+Z_2=(4.539904997+11.14717238)+(8.910065242+10.0369591)j\\Z_T=15.68707738+18.94702434j$

Finally:

$I=\sqrt{15.68707738^2+18.94702434^2} \angle arctan (\frac{18.94702434}{15.68707738} )=24.598\angle 50.377$

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A 1.5-kg specimen of a 90 wt% Pb-10 wt% Sn alloy (Animated Figure 9.8) is heated to 250°C; at this temperature it is entirely an

Alex17521 [72]

Answer:

A. By hit and trial method 280 C

Explanation:

ion know B sorry

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Rivers account for _____% of the earth's fresh water.<br> ?

Black_prince [1.1K]

Answer:

0.49%

Explanation:

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Technician A says that a part is considered bent if it has a sharp bend with a small radius over a short distance. Technician B

zhuklara [117]

In the above case with Technician A and B, non of them are correct in what they have said.

This is known to be a sharp bend that is known to have a little radius over a short distance.

A Bend is said to be the slow alteration or change in shape that exist between the damaged and undamaged area.

Therefore, looking at the definition, you can see that In the above case with Technician A and B, non of them are correct in what they have said.

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Which battery produces more volts per cell, maintenance type or maintenance free ?

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Double aa battery. It’s is a very high bolted battery that can power up a lot of things

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