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STatiana [176]
2 years ago
9

A trail map has a scale of 3 inches to 2 miles. On the map, a trail is

Mathematics
1 answer:
igor_vitrenko [27]2 years ago
6 0

Answer:  C. 3 and 1/2 miles

Step-by-step explanation:

Convert the scale to a unit measure.

3 inches to 2 miles.  Divide both numbers by 3.  

1 inch = ²/₃ mile

Multiply the inches by the unit scale.

5¹/₄ × ²/₃   change to improper fraction ²¹/₄ × ²/₃ = ⁴²/₁₂  3⁶/₁₂

That is  3 and 1/2 miles

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Answer:

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Step-by-step explanation:

a) The spring constant is calculated by using this expression:

k = \frac{F}{x}

k = \frac{30\,N}{0.1\,m}

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\Delta U_{k} = \frac{1}{2}\cdot k \cdot (x_{f}^{2}-x_{o}^{2})

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c) The work needed to stretch the spring is:

\Delta U_{k} = \frac{1}{2}\cdot (300\,\frac{N}{m} )\cdot [(0.2\,m)^{2}-(0\,m)^{2}]

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d) The work need to stretch the spring is:

\Delta U_{k} = \frac{1}{2}\cdot (300\,\frac{N}{m} )\cdot [(0.2\,m)^{2}-(0.1\,m)^{2}]

\Delta U_{k} = 4.5\,J

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