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Archy [21]
3 years ago
13

"An equal-tangent sag vertical curve connects a –1.5% initial grade and a +1.25% final grade. The design speed is 70 mi/h and th

e station and elevation of the PVT are 138+70 and 851.5 ft, respectively. A storm drain is to be installed at the low point of the curve. What is the station and elevation of the low point?"

Engineering
1 answer:
Lubov Fominskaja [6]3 years ago
3 0

Answer:

attached below

Explanation:

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An ordinary egg can be approximated as a 5.5-cm-diameter sphere. The egg is initially at a uniform temperature of 8°C and is dro
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Answer:

thanks for the points haha

8 0
3 years ago
Gold forms a substitutional solid solution with silver. Calculate the number of gold atoms per cubic centimeter (in atoms/cm3) f
bija089 [108]

Answer:

Na = 5.911 × 10^{21}  atoms/cm³

Explanation:

given data

silver-gold alloy  C Au = 17 wt%

densities ρ Au = 19.32 g/cm³

densities ρ Ag = 10.49 g/cm³

atomic weights A Au  = 196.97 g/mol

atomic weights A Ag  = 107.87 g/mol

solution

we will apply here formula for number of gold atoms that is

Na = \frac{NA * C Au}{\frac{C Au * A Au}{\rho Au} + \frac{A Au * (100-C Au)}{\rho Ag}}        ............................1

here NA is Avogadro's number and ρ  is density of two element and A is atomic weight

put here value

Na = \frac{6.022*10^{23} * 0.17}{\frac{0.17 * 196.97}{19.32} + \frac{196.97 * (100-0.17)}{10.49}}

Na = 5.911 × 10^{21}  atoms/cm³

8 0
4 years ago
The outer surface of a spacecraft in space has an emissivity of 0.6 and an absorptivity of 0.2 for solar radiation. If solar rad
kondaur [170]

Answer:

T surface = 3.9°C

Explanation:

given data

emissivity  0.6

absorptivity = 0.2

solar radiation is incident rate =  1200 W/m²

solution

we get here surface temperature by equality of emitted and absorbed heat rate that is

Q (absorbed) = Q (heat )  .................1

α Qinc = \epsilon * \sigma *A*T^4(surface)  

T surface = \sqrt[4]{\frac{\alpha Qinc}{\epsilon *\sigma * A} }       ..........................2

put here value and we get

T surface = \sqrt[4]{\frac{0.2*1000}{0.6*5.67**10^{-8}} }  

T surface = 276.9 K

T surface = 3.9°C

8 0
3 years ago
which acpi power state allows a system to start where it left off, but all other components are turned off? sleeping mechanical
Katena32 [7]

Answer:I don’t know.

Explanation:I work for carrier and we haven’t really gotten into that yet.

3 0
3 years ago
for DC electrode positive, or reverse polarity you will have a negative work cable and what type of electrode?
lina2011 [118]
Positive because the changes
7 0
3 years ago
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