Sustainable Energy
1st Edition
ISBN: 9781133108689
Author: Richard A. Dunlap
Publisher: Cengage Learning
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Chapter 20, Problem 3P
If hydrogen followed an ideal gas law at all pressures, calculate the pressure at which the density of CHG would exceed that of LH2 (71 kg/m3).
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Develop a signal design and timing for the intersection shown in the figure below. In each case
accommodate both vehicular and pedestrian movements. In general, use the following values
for the problem: pedestrian walking speed = 1 [m/s], vehicle deceleration = 3 [m/s²], driver
reaction time = 1.5 [s], length of vehicle = 6 [m], and level grade = 0. If you need to assume
other variables and parameters to solve this problem clearly state that in your report and
explain the reason.
A250
1100
One-way
Speed limit = 50 [km/h]
Pedestrian = 15 per each crosswalk
Crosswalk widths = 3 [m]
Lane width = 4 [m]
Saturation flow = 1800 [veh/h/lane]
1100
↑ 200
70
80
900
how land use and urban structure contribute to financial stability or instability.
Q1 parts B and C but plz draw it out or something plz put it on a bread board with resistors and a voltage source please do not show it in the schematic way like in the picture there if you can show it on like thinkercad
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- A pre-timed four-phase signal has critical lane group flow rates for the first three phases of 260, 280, and 310 [veh/h] (saturation flow rates are 2000 [veh/h/In] for all phases). The lost time is known to be 5 seconds for each phase. If the cycle length is 90 seconds, what is the estimated effective green time of the fourth phase?arrow_forwarda. Assume a bus line with N stops, where the distance between stops is S. Free flow speed of the bus is v, with acceleration and deceleration, a. P passengers per stop are boarding and alighting, and the time needed for a passenger to board or alight is T seconds. What is the average speed of a bus? b. Following on part (a), assume the origins of passengers are spread uniformly along the bus route. The destination of all passengers is the last stop. The walking speed of passengers is u. Determine the average travel time (walking + in-vehicle) of passengers. c. Simplify the above equation when N is large enough (approximating N-1/2 by N-1). Consider now that you can decide on S, where you replace N=L/S (L is the length of the route). Find the value of S that minimises the travelling time of the passengers. d. In the same setting as (c), assume that some passengers do not go to the terminal but alight before. Explain if your answer from (c) would increase or decrease and why. If you need…arrow_forwardThe minimum cycle length for an intersection is determined to be 95 seconds. The critical lane group flow ratios were calculated as 0.235, 0.25, 0.17, and 0.125, respectively. Assuming 5 seconds lost per phase, determine which X was used.arrow_forward
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