Answer:
≈ 18.62 kw
Explanation:
Given data :
Diversity factor among transformer = 1.3
No of transformers load demand factor diversity factor
Transformer 1 10 kw 0.65 1.5
Transformer 2 12 kw 0.6 3.5
Transformer 3 15 kw 0.7 1.5
calculate the maximum load on the feeder
demand factor = max demand / load
Max demand = demand factor * load
max demands:
Transformer 1 = 0.65 * 10 = 6.5
Transformer 2 = 0.6 * 12 = 7.2
Transformer 3 = 0.7 * 15 = 10.5
Diversity factor = ( summation of max demands ) / maximum load on feeder
1.3 = ( 6.5 +7.2 + 10.5 ) / max load on feeder
hence : max load on feeder = 24.2 / 1.3 = 18.62 kw
Answer:
0.96kg/s
Explanation:
Hello! To solve this exercise we must use the first law of thermodynamics, which states that the sum of the energies that enter a system is the same amount that must go out. We must consider the following!
state 1 : is the first flow in the input of the chamber
h1=entalpy=335.02KJ/kg
m1=mass flow=0.56kg/s
state 2 : is the second flow in the input of the chamber
h2=entalpy=83.915KJ/kg
state 3:is the flow that comes out
h3=entalpy=175.90 kJ/kg
now use the continuity equation that states that the mass flow that enters is the same as the one that comes out
m1+m2=m3
now we use the first law of thermodynamics
m1h1+m2h2=m3h3
335.02m1+83.915m2=175.9m3
as the objective is to find the cold water mass flow(m2) we divide this equation by 175.9
1.9m1+0.477m2=m3
now we subtract the equations found in the equation of continuity and first law of thermodynamics
m1 + m2 = m3
-
1.9m1 + 0.477m2=m3
----------------------------------
-0.9m1+0.523m2=0
solving for m2
the mass flow rate of the cold-water is 0.96kg/s
Given Information:
Current of Ideal source = Is = 100 mA = 0.100 A
Open circuit voltage = Voc = 6 V
Short circuit current = Isc = 200 mA = 0.200 A
Required Information:
Power absorbed by idea current source = ?
Answer:
Power absorbed by idea current source = 0.3 Watts
Explanation:
Ideal Current Source:
An ideal current source doesn't have internal resistance and provides constant current regardless of the voltage supplied to the circuit.
The power absorbed by the ideal source can be found using
P = Is²R
Where Is is the ideal source current and R can be found using
R = Voc/Isc
Where Voc is the open circuit voltage and Isc is the short circuit current.
R = 6/0.200
R = 30 Ω
Therefore, the power absorbed by the ideal current source is
P = Is²R
P = (0.100)²*30
P = 0.3 Watts
Answer:
(1) 2553 N = 2550 N
(2) 58342 m = 58300 m
(3) 68.534 s = 68.5 s
Explanation:
To round off a number to any significant number start from the last digit, round it off to 1 if the number is up to 5 and to 0 if the last digit is less than 5. Add this 1 or 0 to the preceding digit and continue the process until you are left with three non zero digits, if you are rounding off to three significant figures.
(1) Round off 2553 N to three significant figures.
= 2550 N
(2) Round off 58342 m to three significant figures.
= 58300 m
(3) Round off 68.534 s to three significant figures.
= 68.500 s (zero after decimal point is insignificant)
= 68.5 s
Answer:
The correct option is;
Fluid power systems are much more efficient with regards to energy costs and overall cost savings
Explanation:
The option that will provide a valid reason for the larger proportion of the consumers to change to the fluid power trucks from the diesel powered trucks is the possibility of increased efficiency in the cost of energy, and the cost savings to be made from making the switch to the fluid power trucks, due to the lower input required and the faster rate at which the consumer budget will be rebalanced leading to increased return on investment and improved rate of return.
