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2 years ago

3) How far will 20 N of force stretch a spring with a spring constant of 140 N/m?

Physics

1 answer:

muminat2 years ago

4 0

Answer:

7 meters, 2.8 meters

Explanation:

work done (nm) = force (n) * distance (m)

140= 20 * m

140/20 = m

m=7 meters

140= 50 * m

140/50 = m

m= 2.8 meters

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3 years ago

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3 years ago

The resistance, R, of a wire varies directly as its length and inversely as the square of its diameter. If the resistance of a w

lbvjy [14]

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R ∝ length

R is also proportional to the inverse square of the diameter:

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The resistance of a wire 2700ft long with a diameter of 0.26in is 9850Ω. Now let's change the shape of the wire, adding and subtracting material as we go along, such that the wire is now 2800ft and has a diameter of 0.1in.

Calculate the scale factor due to the changed length:

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k₂ = 1/(0.1/0.26)² = 6.76

Multiply the original resistance by these factors to get the new resistance:

R = R₀k₁k₂

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3 years ago

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astraxan [27]

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2 years ago

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SIZIF [17.4K]

Beaker would be most appropriate for measuring the approximate volume of a liquid.

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3 years ago