Answer:
public static int average(int j, int k) {
return (int)(( (long)(i) + (long)(j) ) /2 );
}
Explanation:
The above code returns the average of two integer variables
Line 1 of the code declares a method along with 2 variables
Method declared: average of integer data type
Variables: j and k of type integer, respectively
Line 2 calculates the average of the two variables and returns the value of the average.
The first of two integers to average is j
The second of two integers to average is k
The last parameter ensures average using (j+k)/2
Hi! Hope you're having a great day!
This question is incomplete, the complete question is;
A 1,040 N force is recorded on a hemispherical vane as it redirects a 2.5 cm- blade diameter water jet through a 180 angle.
Determine the velocity of the flowing water jet if the blade is assumed to be frictionless.
Answer: the velocity of the flowing water jet is 32.55 m/s assuming the blade is frictionless
Explanation:
Given that;
Force Ft = 1040 N
diameter d = 2.5 cm = 0.025 m
we know that; force acting on Hemispherical plate is;
Ft = 2δav²
where
a is area = π/4(0.025)²
δ is density of water = 1000 kg/m³
v is velocity = ?
now we substitute
1040 = 2 × 1000 × (π/4(0.025)²) × v²
1040 = 0.9817v²
v² = 1040 / 0.9817
v² = 1059.3867
v = √1059.3867
v = 32.5482 ≈ 32.55 m/s
Therefore the velocity of the flowing water jet is 32.55 m/s assuming the blade is frictionless
Answer:
Solidification time is 2.78 min.
Explanation:
Chvorinov's rule states that the solidification time is directly proportional to the square of ratio of total volume to the total surface area of the cast.
Step1
Given:
Chvorinov's rule constant is 4 min/cm².
Length of the rectangular cast is 30 cm.
Width of the rectangular cast is 15 cm.
Thickness of the rectangular cast is 20 mm or 2 cm.
Calculation:
Step2
Volume of the cast is calculated as follows:


V = 900 cm³.
Step3
Total surface area is calculated as follows:
A=2(lb+bt+tl)

A=1080 cm².
Step4
Time of solidification is calculated as follows:


t = 2.78 min.
Thus, solidification time is 2.78 min.