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Korvikt [17]
2 years ago
15

What is the answer?

Physics
1 answer:
Andrews [41]2 years ago
3 0

Answer:

6.26 m/s

Explanation:

Pretty slow.... the PE (Potential Energy) at 2m will be converted to KE (Kinetic Energy) at the bottom of the track (neglecting friction)

PE    =   KE

mgh = 1/2 mv^2     divide both sides of the equation by 'm'

gh    = 1/2 v^2             multiply both sides by 2

2 gh = v^2               take sqrt of both sides

v = sqrt ( 2gh) = sqrt ( 2*9.81*2) = 6.26 m/s

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Decreases.

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A wire of resistivity ρ must be replaced in a circuit by a wire of the same material but four times as long. If, however, the to
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The two wires must have the same resistance, so:

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The wires are made of the same material, so ρ₁ = ρ₂:

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