Answer:
Optimal aspect ratio = 1
Explanation:
From Chvorinov's Rule,
Where
T = solidification time
c = mold constant
For the riser to have the longest solidification time:
We have: D = h
Therefore,
To have to longest solidification time, D = h
Therefore the best aspect ratio would be,
Answer:
The rate of irreversible loss will be "55.22 MW".
Explanation:
The given values are:
Elevation,
h = 120 m
Flow of water,
Q = 100 m³/s
Efficiency,
= 80%
i.e,
= 0.8
Efficiency turbine,
= 50 MW
Now,
Without any loss,
The power generated by turbine will be:
⇒ 
On substituting the values, we get
⇒ 
⇒ 
Power generated in actual will be:
= 
= 
Hence,
Throughout the piping system,
The rate of irreversible loss is:
= 
= 
= 
Known :
Q = 300 L/s = 0.3 m³/s
D1 = 350 mm = 0.35 m
D2 = 700 mm = 0.7 m
g = 9.81 m/s²
Solution :
A1 = πD1² / 4 = π(0.35²) / 4 = 0.096 m²
A2 = πD2² / 4 = π(0.7²) / 4 = 0.385 m²
hL = (kL / 2g) • (U1² - U2²)
hL = (kL / 2g) • Q² (1/A1² - 1/A2²)
hL = (1 / 2(9.81)) • (0.3²) • (1/(0.096²) - 1/(0.385²))
hL = 0.467 m
The correct answer would be d
The objects will not move towards or away from each other
Hope this helps