Find the median path loss under the Hata model assuming fc = 900 MHz, ht = 20m, hr = 5 m and d = 100m for a large urban city, a
small urban city, a suburb, and a rural area. Explain qualitatively the path loss differences for these 4 environments.
1 answer:
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Question:
The following tabulated data were gathered from a series of Charpy impact tests on a commercial low-carbon steel alloy.
Temperature(∘C)50403020100-10-20-30-40Impact energy (J)76767158382314951.5
(a) Plot the data as impact energy versus temperature.
(b) Determine a ductile-to-brittle transition temperature as the temperature corresponding to the average of the maximum and minimum impact energies.
(c) Determine a ductile-to-brittle transition temperature as the temperature at which the impact energy is 20 J.
Answer:
a) see the attached graph
b) max E = 76 and Min E =1.53 average = 77.5/2 = 38.75 J
this corresponds to about 10° C
c ) at E = 20 J temperature is about -2°C
Answer:
maximum acceleration is 1.746 m/s²
Explanation:
given data
= (α) - (β) ×(u(t))
speed = rest to 50 mi/h = 22.352 m/s
time = 12.8 sec
speed = rest to 65 mi/h = 29.05 m/s
time = 19.8 sec
solution
we get here maximum acceleration of vehicle that is
maximum acceleration =
maximum acceleration = ...............1
put here value
maximum acceleration =
maximum acceleration = 1.746 m/s²
and for another vehicle
maximum acceleration =
maximum acceleration = 1.46 m/s²
so here maximum acceleration is 1.746 m/s²