3 years ago

What resistance would produce a current of 120A from a 6-volt battery?

Physics

1 answer:

andriy [413]3 years ago

6 0

120/6=20 ohms :) would be the ans

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Aleksandr [31]

Answer:

(A)

Explanation:

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2 years ago

The lower atmosphere is mostly warmed by radiated heat from Earth's surface. However, water heats up and cools down more slowly

JulsSmile [24]

The answer is B. On a sunny day, the air over a lake will be cooler than the air over the bordering land.

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3 years ago

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2 years ago

A red cross helicopter takes off from headquarters and flies 120 km at 70 degrees south of west. There it drops off some relief

fiasKO [112]

Answer:

130 km at 35.38 degrees north of east

Explanation:

Suppose the HQ is at the origin (x = 0, y = 0)

So the coordinates of the helicopter after the 1st flight is

$x_1 = -120cos70^o = -41.04 km$

$y_1 = -120sin70^o = -112.763 km$

After the 2nd flight its coordinate would be:

$x_2 = x_1 - 75sin60^o = -41.04 - 64.95 = -106km$

$y_2 = y_1 + 75cos60^o = -112.763 + 37.5 = -75.263 km$

So in order to fly back to its HQ it must fly a distance and direction of

$s = \sqrt{y_2^2 + x_2^2} = \sqrt{75.263^2 + 106^2} = \sqrt{5664.519169 + 11236} = \sqrt{16900.519169} = 130 km$

$tan\theta = \frac{y_2}{x_2} = \frac{75.263}{106} = 0.71$

$\theta = tan^{-1}0.71 = 0.62 rad \approx 35.38^o$ north of east

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2 years ago

15. In the diagram shown, the emf of the secondary winding is______ the emf of the primary winding.

sp2606 [1]

Answer:

Greater than

Explanation:

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2 years ago