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Natalija [7]
2 years ago
9

A 200 g mass is placed on the meter stick 20 cm from the fulcrum. An

Physics
1 answer:
stira [4]2 years ago
3 0

Answer:

m = 500 grams

Explanation:

Assuming that the fulcrum is at the midpoint of a uniform meter stick, the moments about the fulcrum must be equal and opposite.

the 200 g mass makes a moment

200(g)[20] = 4000g gm•cm

the other mass must also create a moment of the same value

m(g)[8] = 4000g

m[8] = 4000

m = 500 grams

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Answer:

remove contamination; pollution ; test ground water and dirt .

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If the diameter of a radar dish is doubled, what happens to its resolving power assuming that all other factors remain unchanged
kirill115 [55]

Answer:

      θ’ = θ₀ / 2

we see that the resolution angle is reduced by half

Explanation:

The resolving power of a radar is given by diffraction, for which we will use the Rayleigh criterion for the resolution of two point sources, they are considered resolved if the maximum of diffraction of one coincides with the first minimum of the other.

The first minimum occurs for m = 1, so the diffraction equation of a slit remains

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in general, the diffraction patterns occur at very small angles, so

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in the case of radar we have a circular aperture and the equation must be solved in polar coordinates, which introduces a numerical constant.

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In this exercise we are told that the opening changes

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we substitute

          θ ‘= 1.22  λ / 2a

          θ' = (1.22 λ / a) 1/2

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we see that the resolution angle is reduced by half

8 0
3 years ago
As an IT technician for your company, you have been notified that the Windows domain does not seem to be functioning properly. B
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During an experiment, Ellie records a measurement of 0.0034 m. How would
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Answer:

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Consider a horse pulling a buggy. Is the
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Yes, it's true.

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