Answer:
b) River
the primary source of all water supply is to be said as River
Explanation:
Answer:
26 lbf
Explanation:
The mass of the satellite is the same regardless of where it is.
The weight however, depends on the acceleration of gravity.
The universal gravitation equation:
g = G * M / d^2
Where
G: universal gravitation constant (6.67*10^-11 m^3/(kg*s))
M: mass of the body causing the gravitational field (mass of Earth = 6*10^24 kg)
d: distance to that body
15000 miles = 24140 km
The distance is to the center of Earth.
Earth radius = 6371 km
Then:
d = 24140 + 6371 = 30511 km
g = 6.67*10^-11 * 6*10^24 / 30511000^2 = 0.43 m/s^2
Then we calculate the weight:
w = m * a
w = 270 * 0.43 = 116 N
116 N is 26 lbf
Answer
given,
6 lanes divided highway 3 lanes in each direction
rolling terrain
lane width = 10'
shoulder on right = 5'
PHF = 0.9
shoulder on the left direction = 3'
peak hour volume = 3500 veh/hr
large truck = 7 %
tractor trailer = 3 %
speed = 55 mi/h
LOS is determined based on V p
10' lane weight ; f_{Lw}=6.6 mi/h
5' on right ; f_{Lc} = 0.4 mi/hr
3' on left ; no adjustment
3 lanes in each direction f n = 3 mi/h
![v_p =\dfrac{V}{f_{HV}\times N\times f_p\times PHF}](https://tex.z-dn.net/?f=v_p%20%3D%5Cdfrac%7BV%7D%7Bf_%7BHV%7D%5Ctimes%20N%5Ctimes%20f_p%5Ctimes%20PHF%7D)
![f_{HV}=\dfrac{1}{1+P_T(E_T-1)+P_R(E_R-1)}](https://tex.z-dn.net/?f=f_%7BHV%7D%3D%5Cdfrac%7B1%7D%7B1%2BP_T%28E_T-1%29%2BP_R%28E_R-1%29%7D)
![f_{HV}=\dfrac{1}{1+0.08(2.5-1)+0.02(2-1)}](https://tex.z-dn.net/?f=f_%7BHV%7D%3D%5Cdfrac%7B1%7D%7B1%2B0.08%282.5-1%29%2B0.02%282-1%29%7D)
= 0.877
![v_p =\dfrac{3500}{0.877\times 3\times 0.95\times0.9}](https://tex.z-dn.net/?f=v_p%20%3D%5Cdfrac%7B3500%7D%7B0.877%5Ctimes%203%5Ctimes%200.95%5Ctimes0.9%7D)
= 1,555 veh/hr/lane
![FFS = BFFS - F_{Lw}-F_{Lc}-F_{N}-F_{ID}](https://tex.z-dn.net/?f=FFS%20%3D%20BFFS%20-%20F_%7BLw%7D-F_%7BLc%7D-F_%7BN%7D-F_%7BID%7D)
= (55 + 5) - 6.6 - 0.4 -3 -0
= 50 mi/h
![D = \dfrac{V_P}{s}](https://tex.z-dn.net/?f=D%20%3D%20%5Cdfrac%7BV_P%7D%7Bs%7D)
![D = \dfrac{1555}{55} =28.27](https://tex.z-dn.net/?f=D%20%3D%20%5Cdfrac%7B1555%7D%7B55%7D%20%3D28.27)
level of service is D using speed flow curves and LOS for basic free moving of vehicle
Answer:
Change in entropy S = 0.061
Second law of thermodynamics is satisfied since there is an increase in entropy
Explanation:
Heat Q = 300 kW
T2 = 24°C = 297 K
T1 = 7°C = 280 K
Change in entropy =
S = Q(1/T1 - 1/T2)
= 300(1/280 - 1/297) = 0.061
There is a positive increase in entropy so the second law is satisfied.