Times the radius squared !
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Answer: (B) 100
Explanation:
Given that;
Pstatic = 20 psig , hz = 160ft, hf = 20ft
Now total head will be;
T.h = hz + hf
T.h= 160 + 20
T.h = 180ft
Minimum pressure = Psatic + egh
we know that specific weight of water is 62.4 (lb/ft3)
so
P.min = (20 bf/in² ) + (62.4 b/ft³ × 180 fr
P.min = (20 bf/in² ) + ( 62.4 × 180 × 1 ft²/144 in²)
P.min = 20 + 78
P.min = 98 lbf/in²
Therefore the minimum pressure rating (psi) of the piping system is most nearly B) 100
Answer:
41.6 A
Explanation:
Total power drawn = 1200 W + 1450 W + 1146 W + 1196 W = 4992 W
Power P = IV
I = P/V
Where I is the rms current,
V is the voltage = 120 V
I = 4992/120 = 41.6 A
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Answer:
R = 26 m and R = 14 m
Explanation:
For two displacements two we can have several results, let's analyze each one of them
- collineal vectors, in the same direction
R = A + B
R = 20 +6
R = 26 m
- Vectors in the opposite direction
R = A-B
R = 20-6
R = 14 m
- angled vactors
R = √ (A² + B²)
R = √( 20² + 6²)
R = 20.88 m
We can see that the displacements are maximum and minimum when the vectors are collinear