Answer:
b). False
Explanation:
Lumped body analysis :
Lumped body analysis states that some bodies during heat transfer process remains uniform at all times. The temperature of these bodies is a function of temperature only. Therefor the heat transfer analysis based on such idea is called lumped body analysis.
Biot number is a dimensionless number which governs the heat transfer rate for a lumped body. Biot number is defined as the ratio of the convection transfer at the surface of the body to the conduction inside the body. the temperature difference will be uniform only when the Biot number is nearly equal to zero.
The lumped body analysis assumes that there exists a uniform temperature distribution within the body. This means that the conduction heat resistance should be zero. Thus the lumped body analysis is exact when biot number is zero.
In general it is assume that for a lumped body analysis, Biot number 0.1
Therefore, the smaller the Biot number, the more exact is the lumped system analysis.
Answer:
the relative compaction is 105.88 %
Explanation:
Given;
dry unit weight of field compaction, = 18 kN/m³
maximum dry unit weight measured, = 17 kN/m³
Relative compaction (RC) of the site is given as the ratio of dry unit weight of field compaction and maximum dry unit weight measured
Relative compaction (RC) = dry unit weight of field compaction / maximum dry unit weight measured
substitute the given values;
RC (%) = 105.88 %
Therefore, the relative compaction is 105.88 %
Answer:
The solution is given in the attachments.
Answer:
Time period = 41654.08 s
Explanation:
Given data:
Internal volume is 210 m^3
Rate of air infiltration
length of cracks 62 m
air density = 1.186 kg/m^3
Total rate of air infiltration
total volume of air infiltration
Time period
There at end of the movement, the forging force is given by
h is the final height.
The ultimate radius is determined by following a volume constancy law, which states that volumes before deformation measured amount following distortion.
You may deduce from the graph flow that , thus we use the formula.
Therefore, the answer is "45.3 NM".
Learn more:
Answer:
45.3 MN
Explanation:
The forging force at the end of the stroke is given by
F = Y.π.r².[1 + (2μr/3h)]
The final height, h is given as h = 100/2
h = 50 mm
Next, we find the final radius by applying the volume constancy law
volumes before deformation = volumes after deformation
π * 75² * 2 * 100 = π * r² * 2 * 50
75² * 2 = r²
r² = 11250
r = √11250
r = 106 mm
E = In(100/50)
E = 0.69
From the graph flow, we find that Y = 1000 MPa, and thus, we apply the formula
F = Y.π.r².[1 + (2μr/3h)]
F = 1000 * 3.142 * 0.106² * [1 + (2 * 0.2 * 0.106/ 3 * 0.05)]
F = 35.3 * [1 + 0.2826]
F = 35.3 * 1.2826
F = 45.3 MN
Answer:
The amount of heat transferred to the air is 340.24 kJ
Explanation:
From P-V diagram,
Initial temperature T1 = 27°C
Initial pressure P1 = 100 kPa
final pressure P3 = P2 = 300 kPa
volume at point 2, V2 = V1 = 0.4 m³
final temperature T2 = T3 = 1200 K
To determine the final pressure V3, use ideal gas equation
PV = mRT
Where R is the specific gas constant = 0.2870 KPa m³ kg K
But,
from initial condition, mass m = PV/RT
m = (P1*V1)/R*T1
T1 = 27+273 = 300K
m = (100*0.4)/(0.2870*300) = 0.4646 kg
Then;
Final volume V3 = mRT3/P3
V3 = (0.4646*0.2870*1200)/300
V3 = 0.5334 m³
Total work done W is determined where there is volume change which from point 2 to 3.
W = P3*(V3-V2)
W = 300*(0.5334-0.4) = 40.02 kJ
To get the internal energy, the heat capacity at room temperature Cv is 0.718 kJ/kg K
∆U = m*Cv*(T2-T1)
∆U = 0.4646*0.718(1200-300)
∆U = 300.22 kJ
The heat transfer Q = W + ∆U
Q = 40.02 + 300.22 = 340.24 kJ
Determine the amount of heat transferred to the air, in kJ, while increasing the temperature to 1200 K is 340.24 kJ
The attached file shows the Pressure - Volume relationship (P -V graph)
Answer:
Output:-
Enter the five digit lottery number
Enter the digit 1 : 23
Enter the digit 2 : 44
Enter the digit 3 : 43
Enter the digit 4 : 66
Enter the digit 5 : 33
YOU LOSS!!
Computer Generated Lottery Number :
|12|38|47|48|49|
Lottery Number Of user:
|23|33|43|44|66|
Number Of digit matched: 0
Code:-
import java.util.Arrays;
import java.util.Random;
import java.util.Scanner;
public class Lottery {
int[] lotteryNumbers = new int[5];
public int[] getLotteryNumbers() {
return lotteryNumbers;
}
Lottery() {
Random randomVal = new Random();
for (int i = 0; i < lotteryNumbers.length; i++) {
lotteryNumbers[i] = randomVal.nextInt((50 - 1) + 1);
}
}
int compare(int[] personLottery) {
int count = 0;
Arrays.sort(lotteryNumbers);
Arrays.sort(personLottery);
for (int i = 0; i < lotteryNumbers.length; i++) {
if (lotteryNumbers[i] == personLottery[i]) {
count++;
}
}
return count;
}
public static void main(String[] args) {
int[] personLotteryNum = new int[5];
int matchNum;
Lottery lnum = new Lottery();
Scanner input = new Scanner(System.in);
System.out.println("Enten the five digit lottery number");
for (int i = 0; i < personLotteryNum.length; i++) {
System.out.println("Enter the digit " + (i + 1) + " :");
personLotteryNum[i] = input.nextInt();
}
matchNum = lnum.compare(personLotteryNum);
if (matchNum == 5)
System.out.println("YOU WIN!!");
else
System.out.println("YOU LOSS!!");
System.out.println("Computer Generated Lottery Number :");
System.out.print("|");
for (int i = 0; i < lnum.getLotteryNumbers().length; i++) {
System.out.print(lnum.getLotteryNumbers()[i] + "|");
}
System.out.println("\n\nLottery Number Of user:");
System.out.print("|");
for (int i = 0; i < personLotteryNum.length; i++) {
System.out.print(personLotteryNum[i] + "|");
}
System.out.println();
System.out.println("Number Of digit matched: " + matchNum);
}
}
Explanation: