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soldier1979 [14.2K]
3 years ago
7

I need a science fair project that doesn't need anything on the pic and it can be about any subject thanks.

Physics
1 answer:
tigry1 [53]3 years ago
7 0

you could make a self propelled car all you need is cardboard, wheels, and a balloons or rubber bands

  

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A thin, flat washer is a disk with an outer diameter of 14 cm and a hole in the center with a diameter of 7 cm. The washer has a
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Answer:

2583.9 N/C

Explanation:

Parameters given:

Outer diameter = 14 cm

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Inner diameter = 7 cm

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Distance from washer, z = 33 cm = 0.33m

The electric field due to a washer (hollow disk) is given as:

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σ = 2.077 * 10^(-6) C/m²

=> E = 9 * 10^9 * 2.077 * 10^(-6) * 2π * [1 - 0.33/(√(0.33² + 0.07²)]

E = 117.467 * 10^3 * (1 - 0.978)

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