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Sphinxa [80]
2 years ago
8

The cables of a power line are copper-coated steel wire. The overall diameter of the wire is 5/8 in. The steel core has a diamet

er of 1/2 in.
If the maximum tension in a wire is 8000 lb, what are the stresses in the steel and the copper?
Engineering
1 answer:
Jobisdone [24]2 years ago
3 0

Answer:

The stresses in steel and the copper are, 128 ksi and 72.44 ksi, respectively.

Explanation:

In this case, we need to calculate the area of both portions separately.

Thus, we know that:

Inner Radius = Rin = (1/2 in)/2 = 0.25 in

Outer Radius = Rout = (5/8 in)/2 = 0.3125 in

FOR STEEL CORE:

Area of steel core = As = π(Rin)² = π(0.25 in)² = 0.0625 in²

Hence, the stress will be:

σs = Force / As

σs = 8000 lb/ 0.0625 in²

<u>σs = 128 ksi</u>

FOR COPPER:

Area of copper = Ac = π[(Rout)² - (Rin)²]

Ac = π[(0.3125 in)² - (0.25 in)²] = 0.11044 in²

Hence, the stress will be:

σc = Force / Ac

σc = 8000 lb/ 0.11044 in²

<u>σc = 72.44 ksi</u>

<u></u>

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7 0
1 year ago
Small droplets of carbon tetrachloride at 68 °F are formed with a spray nozzle. If the average diameter of the droplets is 200 u
Licemer1 [7]

Answer:

the difference in pressure between the inside and outside of the droplets is 538 Pa

Explanation:

given data

temperature = 68 °F

average diameter = 200 µm

to find out

what is the difference in pressure between the inside and outside of the droplets

solution

we know here surface tension of carbon tetra chloride at 68 °F is get from table 1.6 physical properties of liquid that is

σ = 2.69 × 10^{-2} N/m

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now here we know relation between pressure difference and surface tension

so we can derive difference pressure as

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here r is radius and  Δp pressure difference and σ surface tension

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Answer:

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b) Q = 5.4 Kips

Explanation:

GIven

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a) P = ?

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