1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
boyakko [2]
2 years ago
10

A +7.5% grade meets a horizontal grade on a section of a rural mountainous highway. If the length of the crest vertical curve fo

rmed in that section is 300 ft long, determine the safe operating speed on the highway.
Engineering
1 answer:
Rasek [7]2 years ago
4 0

Using the formula of comfort condition it is possible to determine the safe operating speed on the highway.

The comfort condition formula is given by: L=2(\frac{NV^{3} }{C} )^{\frac{1}{2} }

Where, L is the length of the vertical curve, N is the grade, V is teh safe speed operation and assuming the standart value for C (0,6 m/s3) it is possible to calculate:

C = 0,6 m/s^{3} = 1,968 ft/s^{3}\\ N= N1 - N2 = 7,5-0 = 7,5% = 0,075

Changing the values in the formula:

L=2(\frac{NV^{3} }{C}){\frac{1}{2} }  \\300 = 2(\frac{0,075.V^{3} }{1,968})^{\frac{1}{2} } \\V = 83,89 ft/s

So, the safe operating speed on the highway is 83,89 ft/s.

See more about engineering at: brainly.com/question/12812715

#SPJ1

You might be interested in
The product of two factors is 4,500. If one of the factors is 90, which is the other factor?
natulia [17]
The other factor is 50
Hope this help <3
Help me and mark my answer as brainliest plz plz
8 0
2 years ago
A composite shaft with length L = 46 in is made by fitting an aluminum sleeve (Ga = 5 x 10^3 ksi) over a
Xelga [282]

Answer:

Explanation:

Given the data in the question;

L = 46 in

Ga = 5 × 10³ ksi

Gs = 11 × 10³ ksi

Outside diameter da = 5 in

ds = 4 in

Tb = 3 kip.in

Now,

Ja = polar moment of Inertia of Aluminum;

Ja ⇒ π/32( 5⁴ - 4⁴ ) = π/32( 625 - 256 ) = π/32( 369 ) in^u

Js = polar moment of inertia of steel

Js ⇒ π/32 ds⁴ = π/32( 4⁴ ) = π/32( 256 )

Ta is torque transmitted by Aluminum  

Ts is torque transmitted by steel  

{composite member }

T = Ta + Ts ------ let this be equation m1

Now, we use the relation;

T/J = G∅/L

JG∅ = TL

∅ = TL/GJ

so, for aluminum rod ∅_{alu = TaLa/GaJa

for steel rod ∅_{steel = TsLs/GsJs

but we know that, ∅a = ∅s = ∅_B

so

[TaLa/GaJa]  =  [TsLs/GsJs]

also, we know that, La = Ls = L

∴ [Ta/GaJa]  =  [Ts/GsJs]

we solve for Ta

TaGsJs = TsGaJa  

Ta = TsGaJa / GsJs

we substitute

Ta = [Ts(5 × 10³)( π/32( 369) )] / [ (11 × 10³)( π/32( 256 ) ) ]

Ta = 0.66Ts

now, we substitute 0.66Ts for Ta and 3 for T in equation 1

T = Ta + Ts

3 = 0.66Ts + Ts

3 = 1.66Ts

Ts = 3 / 1.66

Ts = 1.8072 ≈ 1.81 kip-in

so

∅_{steel = TsLs / GsJs

we substitute

∅_{steel = (1.81 × 46 ) / ( 11 × 10³ × π/32( 256 ) )

∅_{steel = 83.26 / 276460.1535

∅_{steel  = 0.000301

∅_{steel = 3.01 × 10⁻⁴ rad

so

∅_{steel = ∅_B = 3.01 × 10⁻⁴ rad

Therefore, the magnitude of the angle of twist at end B is 3.01 × 10⁻⁴  rad

5 0
3 years ago
Phosphorus and nitrogen are included in which category of water pollutants?
Evgesh-ka [11]

Answer: Hello :)

They are in the <u>nutrient pollution</u> category.

Explanation:

3 0
2 years ago
Which of the following refers to a full-scale version of a product used to validate performance?
kompoz [17]
I’m thinking it would be c sorry if it’s wrong .
4 0
3 years ago
Read 2 more answers
3.
Andreyy89

Answer:

7

Explanation:

5 + 2 = 7

4 0
2 years ago
Other questions:
  • Thermal energy storage systems commonly involve a packed bed of solid spheres, through which a hot gas flows if the system is be
    13·1 answer
  • The driveshaft of an automobile is being designed to transmit 238 hp at 3710 rpm. Determine the minimum diameter d required for
    8·1 answer
  • 6
    5·1 answer
  • Reusable refrigerant containers under high-pressure must be hydrostatically tested how often?
    10·1 answer
  • Complete the following sentence.
    7·1 answer
  • Q#3:(A)Supose we extend the circular flow mode to add imports and export copy the circular flow digram onto a sheet paper and th
    15·1 answer
  • Please what is dif<br>ference between building technology and building engineering.​
    14·2 answers
  • Which type of engineer is needed in the following scenario?
    8·2 answers
  • Engine horsepower decreases ________% for every___________feet above sea level.
    9·1 answer
  • What Is Photosynthesis ?​
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!