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mariarad [96]
3 years ago
15

NEED HELP PLZ IM FAILING. Combustion occurs when _____. oxidation reactions are very slow oxidation reactions are so fast the su

bstance catches fire oxygen is removed from another substance machines use chemical energy to do work
Physics
2 answers:
lukranit [14]3 years ago
7 0
Combustion<span> will </span>occur<span> when there is not enough oxygen to allow the fuel to react completely to produce carbon dioxide and water.. Hope this helps

</span>
tia_tia [17]3 years ago
3 0

Answer:Combustion occurs when oxidation reactions are so fast the substance catches fire

Explanation:Happy to help :)

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Shrinking Loop. A circular loop of flexible iron wire has an initial circumference of 168 cm , but its circumference is decreasi
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103.1 V

Explanation:

We are given that

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\frac{dC}{dt}=-15cm/s

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We have to find the magnitude of the  emf induced in the loop after exactly time 8 s has passed since the circumference of the loop started to decrease.

Magnetic flux=\phi=BA=B(\pi r^2)

Circumference,C=2\pi r

r=\frac{C}{2\pi}

r=\frac{168}{2\pi} cm

\frac{dr}{dt}=\frac{1}{2\pi}\frac{dC}{dt}=\frac{1}{2\pi}(-15)=-\frac{15}{2\pi} cm/s

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r=-\frac{15}{2\pi}t+C

When t=0

r=\frac{168}{2\pi}

\frac{168}{2\pi}=C

r=-\frac{15}{2\pi}t+\frac{168}{2\pi}

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E=-2\pi(-\frac{5}{2\pi}t+\frac{168}{2\pi})B\times -\frac{15}{2\pi}

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E=103.1 V

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