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
Sedbober [7]
3 years ago
15

Assume you are an observer standing at a point along a three-lane roadway. All vehicles in lane 1 are traveling at 30 mi/h, all

vehicles in lane 2 are traveling at 45 mi/h, and all vehicles in lane 3 are traveling at 60 mi/h. There is also a constant spacing of 0.5 mile between vehicles.
If you collect spot speed data for all vehicles as they cross your observation point, for 30 minutes,
what will be the time- mean speed and space-mean speed for this traffic stream?
Engineering
1 answer:
garik1379 [7]3 years ago
5 0

Answer:

Explanation:

Given data;

  • In line 1, v1 = 30mi/hr
  • in line 2, v2 = 45mi/hr
  • in line 3, v3 = 60mi/hr
  • therefore time mean speed = v1 + v2 + v3 /n
  • = VT = 45mi/hr

  • space mean speed ; Vs
  • harmonic mean = 1/V = 1/v1 + 1/v2 + 1/v3
  • V = 13.85mi/hr
  • Hence Vs = V x n = 3 x 13.85 = 41.55mi/hr
You might be interested in
What’s the purpose of current tracks
Taya2010 [7]

Answer:

What's the purpose of tracks going in the red? Having tracks go into the red is surely redundant, I don't see any purpose in having tracks distort ... It just seems like a hang on from the old days of tape, it's something that people who ... be in daws and I'm trying to assemble an alternative I understand the current mixing system. The Dow Jones Industrial Average (DJIA) is a stock index of 30 blue-chip industrial ... Today, the DJIA is a benchmark that tracks American stocks that are ... To calculate the DJIA, the current prices of the 30 stocks that make up the ... the longevity of the Dow serves this purpose better than all other indices.

Explanation:

3 0
3 years ago
Vital role of maritime english among seaferers
seropon [69]

Answer:

uehgeg7djw7heidiisosowiuisiejei2k

8 0
3 years ago
An inductor has a 50.0-Ω reactance when connected to a 60.0-Hz source. The inductor is removed and then connected to a 45.0-Hz s
nignag [31]

Given:

X_{L} = 50.0 \ohm

frequency, f = 60.0 Hz

frequency, f' = 45.0 Hz

V_rms} = 85.0 V

Solution:

To calculate max current in inductor, I_{L(max):

At f = 60.0 Hz

X_{L} = 2\pi fL

50.0 = 2\pi\times 60.0\times L

L = 0.1326 H

Now, reactance X_{L} at f' = 45.0 Hz:

X'_{L} = 2\pi f'L

X'_{L} = 2\pi\times 45.0\times 0.13263 = 37.5\ohm

Now, I_{L(max) is given by:

I_{L(max) = \sqrt {\frac{2V_{rms}}{X'_{L}}}

I_{L(max) = \sqrt {\frac{2\times 85.0}{37.5}} = 2.13 A

Therefore,  max current in the inductor, I_{L(max) = 2.13 A

7 0
3 years ago
Repetitive movements at work can lead to injuries. True or False
OverLord2011 [107]
Answer

True

Explanation

RSI can occur when you do repetitive movements. Those movements can cause your muscles and tendons to become damaged over time. Some activities that can increase your risk for RSI are: stressing the same muscles through repetition.
8 0
2 years ago
System Integration summary
kenny6666 [7]

Answer:

System integration can be defined as the progressive linking and testing of system components to merge their functional and technical characteristics into a comprehensive interoperable system.

Explanation:

....

6 0
3 years ago
Other questions:
  • A certain heat pump produces 200 kW of heating for a 293 K heated zone while only using 75 kW of power and a heat source at 273
    12·1 answer
  • What are significant figures​
    13·1 answer
  • Suppose that tank holds 1% liquid water by volume and 99% vapor water by volume at a temperature of 185oC. What is the quality?
    10·1 answer
  • Mobility refers to the ability to?
    12·1 answer
  • Tech A says that proper footwear may include both leather and steel-toed shoes. Tech B says that when working in the shop, you o
    15·1 answer
  • What are the coordinates of the centroid of this figure?
    5·1 answer
  • Di hola por 10 puntos
    8·1 answer
  • The main function of a router is to
    14·2 answers
  • A ruptured desiccant bag in a reciever-driver is usually caused by what?​
    13·1 answer
  • The inspector should inspect insulation in unfinished spaces, including attics, _____ and foundation areas.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!