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
Inessa05 [86]
3 years ago
6

From an aerial photograph, one observes that on a level section of a (multilane) highway, 25% of the vehicles are trucks, 75% ar

e cars, and there are 50 vehicles per mile of highway. The trucks travel at 40 mph and the cars at 60 mph. This highway also has a section with a steep grade on which the speed of the trucks drops to 25 mph and the speed of the cars to 55 mph. No vehicles enter or exit the subject highway sections (except at the ends). The flows on these highwaysections are stationary, which means that the flows on the level section are equal to those on the grade. Determine
(a) the flow of vehicles on the level section;
(b) the density of vehicles on the grade;
(c) the percent of trucks on the grade as seen from an aerial photo; (d) the percent of trucks as seen by a stationary observer on the grade.
Engineering
1 answer:
egoroff_w [7]3 years ago
4 0

Answer:

(a) Flow rate of vehicles = No of vehicles per mile * Speed

=No of cars per mile * Speed +No of trucks per mile * Speed

= 0.75*50*60 + 0.25*50*40

=2750 vehicles / hour

(b) Let Density of vehicles on grade = x

Density on flat * Speed =Density on grade * Speed

So,( 0.75*50) * 60 + (0.25*50) * 40 = (0.75* x) * 55 + (0.25* x) * 25

So, x= 57.89

So, Density is around 58 Vehicles per Mile.

(c) Percentage of truck by aerial photo = 25%

(d)Percentage of truck bystationary observer on the grade= 25*30/60 * 25/55 =22.73 %

You might be interested in
QUESTÃO 13. Explique o uso das aspas no trecho "Darei a cada uma de vocês
lesya [120]

Answer: speaks Portuguese

Eu disse a todos a tradução para que possam te ajudar

Explanation: Y’all can help I have no idea

QUESTION 13. Explain the use of quotation marks in the excerpt "I will give each of you

seed. The one who will bring me the most beautiful flower within six months will be chosen but

wife and the future empress of China. ".

QUESTION 14. The palace servant considered the idea of ​​her daughter attending the celeb

organized by the prince of the region, a foolish idea, a madness. This is an OP

Do you agree with this opinion of the character? Justify your answer.

6 0
3 years ago
Two Technicians are discussing ShopKey Pro. Technician
Leno4ka [110]

Answer:

Technician B

Explanation:

i took he test already

6 0
3 years ago
A crankcase heater is often used to prevent refrigerant from mixing with compressor oil during periods of:
stira [4]

Answer:

Low ambient temperature

Explanation:

Hope this helps. If it did, please mark as brianliest so other people see it. Thanks! - Kai

5 0
2 years ago
Read 2 more answers
What happens in double transverse wishbone front suspension when brakes are applied.
RideAnS [48]

Answer:

When the brakes are applied the in the typical double transverse wishbone front suspension,  it "drives" the car ground due to the setting of the link-type system pivot points on the lower wishbone are have parallel alignment to the road

Explanation:

In order to minimize the car's reaction to the application of the brakes, the front and rear pivot are arranged with the lower wishbone's rear pivot made to be higher than the front pivot as such the inclined wishbone torque results in an opposing vertical force to the transferred extra weight from the back due to breaking.

5 0
3 years ago
How much does 5 acres of land cost in the US?
Dvinal [7]

Answer:

Larson, an economist, who placed the total value of $23 trillion for the entire 1.9 billion acres of land in the United States. This means that the average cost for an acre of land is $12,000 or $60,000 for 5 acres of land. Almost half of the land in the US is used for agricultural purposes.

Explanation:

6 0
3 years ago
Other questions:
  • A bar having a length of 5 in. and cross-sectional area of 0. 7 in.2 is subjected to an axial force of 8000 lb. If the bar stret
    9·1 answer
  • A stainless-steel specimen from the same material characterized up above, was formed into a rectangular cross-section of dimensi
    9·1 answer
  • Consider two water tanks filled with water. The first tank is 8 m high and is stationary, while the second tank is 2 m high and
    12·2 answers
  • In remote areas, your gps devices may lose reception. It’s a good idea to have a
    7·2 answers
  • Lets try to get to 100 sub before charismas day <br> Jordan Gracia 32 sub and 5 videos
    13·2 answers
  • What is the most likely reason the rover won't travel in a straight line?
    9·1 answer
  • Joinn my zo om lets play some blookets<br> 98867 708157<br> 9dPQPW
    14·1 answer
  • Leland wants to work in a Production career operating heavy machinery. Which type of education or training should Leland seek?
    9·2 answers
  • ____________ is the organization that oversees environmental compliance.
    14·1 answer
  • It is possible to design a reactor where the scy conductor and the nitrogen/ammonia electrode operate at different temperatures.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!