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inessss [21]
2 years ago
14

A lecture hall having a volume of 106 ft3 contains air at 80°F, 1 atm, and a humidity ratio of 0.01 lb of water vapor per lb of

dry air. Using the appropriate equations, determine(a) the relative humidity.(b) the dew point temperature, in °F.

Engineering
1 answer:
Lyrx [107]2 years ago
3 0

Answer:

(a) %RH = 45%

(b) Dp Temp = 58 °F (14.44 °C)

Explanation:

We can obtain the results easily and faster with a psychometric chart. (See the attachment). In the graph we can see how we obtain results crossing the respective data (marked in red).

First, for the relative humidity, we cross the humidity ratio (starting from the right side) with the dry temperature (horizontal axis). In that way we can read from the relative humidity curves the value of 45%.

After that, we extend the horizontal line from the right side until the left side and cross it with the 100% saturation curve in order to read the dew point temperature. Here we obtain the value 58 °F (14.44 °C)

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A lake has a carrying capacity of 10,000 fish. At the current level of fishing, 2,000 fish per year are taken with the catch uni
arlik [135]

Answer:

The population size would be p' = 5000

The yield would be    MaxYield = 2082 \ fishes \ per \ year

Explanation:

So in this problem we are going to be examining the application of a  population dynamics a fishing pond and stock fishing and objective would be to obtain the maximum sustainable yield and and the population of the fish at the obtained maximum sustainable yield,  so basically we would be applying an engineering solution to fishing

 

    So the current  yield which is mathematically represented as

                               \frac{dN}{dt} =   \frac{2000}{1 \ year }

 Where dN is the change in the number of fish

            and dt is the change in time

So in order to obtain the solution we need to obtain the  rate of growth

    For this we would be making use of the growth rate equation which is

                                      r = \frac{[\frac{dN}{dt}] }{N[1-\frac{N}{K} ]}

  Where N is the population of the fish which is given as 4,000 fishes

          and  K is the carrying capacity which is given as 10,000 fishes

             r is the growth rate

        Substituting these values into the equation

                              r = \frac{[\frac{2000}{year}] }{4000[1-\frac{4000}{10,000} ]}  =0.833

The maximum sustainable yield would be dependent on the growth rate an the carrying capacity and this mathematically represented as

                      Max Yield  = \frac{rK}{4} = \frac{(10,000)(0.833)}{4} = 2082 \ fishes \ per \ year

So since the maximum sustainable yield is 2082 then the the population need to be higher than 4,000 so in order to ensure a that this maximum yield the population size denoted by p' would be

                          p' = \frac{K}{2}  = \frac{10,000}{2}  = 5000\ fishes          

7 0
3 years ago
Read 2 more answers
Which type of boot authentication is more secure?
MA_775_DIABLO [31]

The type of boot authentication that is more secure is Unified Extensible Firmware Interface

Unified Extensible Firmware Interface  help to provide a computer booting that is more secured.

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For a  computer system to boot successfully it means that the Operating system support the  Unified Extensible Firmware Interface because it secured.

Inconclusion The type of boot authentication that is more secure is Unified Extensible Firmware Interface

Learn more here :

brainly.com/question/24750986

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2 years ago
Plane wall of material A with internal heat generation is insulated on one side and bounded by a second wall of material B, whic
viktelen [127]

Sorry❤

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8 0
3 years ago
A disk is rotating around an axis located at its center. The angular velocity is 0.5 rad/s. The radius of the disk is 0.4 m. Wha
dimaraw [331]

Answer:

0.2 m/s

Explanation:

The velocity of a point on the edge of a disk rotating disk can be calculated as:

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4 0
3 years ago
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Programming Assignment 2 Decimal and IEEE-754 ConversionsObjective: To write a C program (not C++) that converts numbers between
kondaur [170]

Answer:

// Program is written in C Programming Language

// Comments are used for explanatory purpose

// Program starts here

#include<stdio.h>

#include<math.h>

//Function to Convert to float

void To float(int num, int I)

{

//Create a kount variable

int kount;

// Start an iteration

for(kount=i-1; kount>0; kount--)

{

if((num>>kount) && 1) {printf("1");}

else { printf("0"); }

}

}

// Create a user defined variable

typedef union {// Definition

float Number;

struct

{

// Mantissa

unsigned int mant : 23;

// Exponent

unsigned int exp : 8;

// Sign

unsigned int sign: 1;

} raw;

} myfloat; // Variable name

// Create print segment

void printsegment(myfloat var)

{

printf("%d |", var.raw.sign);// Sign

To float(var.raw.exp,8); // Exponent

printf("|");

To float(var.raw.mant,8); // Mantissa

printf("\n");

}

// Function to Convert to Real

unsigned int ToReal(int* dig[], int l, int h)

{

unsigned int f = 0, I;

Start an iteration

for(I = h; I>=l;I--)

{

// Calculate individual value

f = f + dig[I] * pow(2,h-1);

}

return f;

}

// Main method start here

int main()

{

printf("Floating Point Conversion\n");

printf("Select any of the following options\n");

printf("1. Decimal to IEEE754 Conversion\n");

printf("2. IEEE754 to Decimal Conversion\n");

printf("3. Quit");

// Declare integer variable for option

int opt;

// Prompt to select option

printf("Select an option; Option 1 to 3: ");

scanf("%d", $opt);

if(opt == 1)

{

printf("You have selected option 1");

// Declare a user defined variable and a system defined variable

myfloat var; float number;

// Accept input

scanf("%d", number);

// Check for special cases

if(isnan(number/0.0))// Not a number

{

printf("Not a Number");

}

else

{

var.f = number;

// Print Sign

printf("%d | ", var.raw.sign);

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ToFloat(var.raw.exp,8);

printf(" | ");

// Print Mantissa

ToFloat(var.raw.mant,23);

}

}// End of option 1;

// Beginning of option 2

else if(opt == 2)

{

printf("You have selected option 2");

// Declare an array and two integer variables

unsigned int number[32];

int ctrlno, I = 0;

// Accept input by through an iteration

for(int k = 0; k < 32; k++)

{

// Create a label

label: scanf("%d", ctrlno);

// Check for special cases

if(isnan(ctrlno/0.0))// Not a number

{

printf("Not a Number"); I++;

break;

}

else if(ctrlno>1 || ctrlno < 0)

{

printf("Invalid Number\n Please enter a valid digit");

goto label;

}

else {

// Assign number to array

number[k] = ctrlno;

}

// Check validity of number

if(I != 0)

{

printf(" Invalid Number Representation");

}

else

{

// Declare user defined variable

myfloat var;

// Get sign

var.raw.sign = number[0];

// Get mantissa; From to 31

unsigned f = ToReal(number,9,31);

var.raw.mant = f;

// Get exponent; 1 to 8

f = ToReal(number,1,8);

var.raw.exp = f;

// Print Output

printf("The converted digit is ");

printf("%f", var.f);

}

else

{

// Quit Application

break;

}

return 0;

}

3 0
3 years ago
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