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3 years ago

This question is confusing to me so I really would like a clear explanation thank you

Mathematics

1 answer:

Wewaii [24]3 years ago

7 0

So the first hour it travels from 1-6 miles, the second hour it travels at least two miles. And the question is "draw the range of miles the boat could of traveled in the second hour". Well first of all the third hour is completely useless so forget about that. Now, the first hour says it traveled from 1-6 miles, we don't know how many miles it traveled for sure but it could of traveled up to 6. So in the second hour when they say "at least two miles" the boat could of travled at least two miles more than 1-6. So 1+2+3, 2+2+4, 3+2=5, 4+2=6, 5+2=7 and 6+2=8. So the boat could of traveled from 3 to 8 miles in the second hour.

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An AISI 1040 cold-drawn steel tube has an OD 5 50 mm and wall thickness 6 mm. What maximum external pressure can this tube withs

lukranit [14]

Answer:

82.79MPa

Step-by-step explanation:

Minimum yield strength for AISI 1040 cold drawn steel as obtained from literature, Sᵧ = 490 MPa

Given, outer radius, r₀ = 25mm = 0.025m, thickness = 6mm = 0.006m, internal radius, rᵢ = 19mm = 0.019m,

Largest allowable stress = 0.8(-490) = -392 MPa (minus sign because of compressive nature of the stress)

The tangential stress, σₜ = - ((r₀²p₀)/(r₀² - rᵢ²))(1 + (rᵢ²/r²))

But the maximum tangential stress will occur on the internal diameter of the tube, where r = rᵢ

σₜₘₐₓ = -2(r₀²p₀)/(r₀² - rᵢ²)

p₀ = - σₜₘₐₓ(r₀² - rᵢ²)/2(r₀²) = -392(0.025² - 0.019²)/2(0.025²) = 82.79 MPa.

Hope this helps!!

8 0

3 years ago

Picture with question

Volgvan

Sorry I don’t get that one

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When Marika bought her house she paid 80% of the purchase price of the house with a loan. She paid the remaining 49,400 of the p

Maurinko [17]

Let

x-----> the purchase price of the house

we know that

1) Marika paid $80\%$ of the purchase price of the house with a loan

2) Marika paid the remaining $\$49,400$ of the purchase price with her savings

3) $\$49,400$ represent the $20\%$ of the purchase price

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Divide by $0.20$ both sides

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therefore

<u>the answer is</u>

the purchase price of the house is $\$247,000$

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