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4 years ago

12

Show that a chirped Gaussian pulse is compressed initially inside a single-mode fiber when ftC < 0. Derive expressions for th

e minimum width and the fiber length at which the minimum occurs.

1 answer:

Damm [24]4 years ago

8 0

Answer:

Given in diagram

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Two kilograms of air within a piston-cylinder assembly execute a Carnot power cycle with maximun1 and minimum temperatures of 75

ExtremeBDS [4]

Answer:

The Answer and Explanation is in the folloing attachment

Explanation:

8 0

4 years ago

For better thermal control it is common to make catalytic reactors that have many tubes packed with catalysts inside a larger sh

Paul [167]

Answer:

the pressure drop is 0.21159 atm

Explanation:

Given that:

length of the reactor L = 2.5 m

inside diameter of the reactor d= 0.025 m

diameter of alumina sphere $dp$ = 0.003 m

particle density = 1300 kg/m³

the bed void fraction $\in =$ 0.38

superficial mass flux m = 4684 kg/m²hr

The Feed is methane with pressure P = 5 bar and temperature T = 400 K

Density of the methane gas $\rho$ = 0.15 mol/dm ⁻³

viscosity of methane gas $\mu$ = 1.429 x 10⁻⁵ Pas

The objective is to determine the pressure drop.

Let first convert the Density of the methane gas from 0.15 mol/dm ⁻³ to kg/m³

SO; we have :

Density = 0.15 mol/dm ⁻³

Molar mass of methane gas (CH₄) = (12 + (1×4) ) = 16 mol

Density = $0.1 5 *\dfrac{16}{0.1^3}$

Density = 2400

Density $\rho_f$ = 2.4 kg/m³

Density = mass /volume

Thus;

Volume = mass/density

Volume of the methane gas = 4684 kg/m²hr / 2.4 kg/m³

Volume of the methane gas = 1951.666 m/hr

To m/sec; we have :

Volume of the methane gas = 1951.666 * 1/3600 m/sec = 0.542130 m/sec

$Re = \dfrac{dV \rho}{\mu}$

$Re = \dfrac{0.025*0.5421430*2.4}{1.429*10^5}$

$Re=2276.317705$

For Re > 1000

$\dfrac{\Delta P}{L}=\dfrac{1.75 \rho_f(1- \in)v_o}{\phi_sdp \in^3}$

$\dfrac{\Delta P}{2.5}=\dfrac{(1.75 *2.4)(1- 0.38)*0.542130}{1*0.003 (0.38)^3}$

$\Delta P=8575.755212*2.5$

$\Delta = 21439.38803 \ Pa$

To atm ; we have

$\Delta P = \dfrac{21439.38803 }{101325}$

$\Delta P =0.2115903087 \ atm$

ΔP ≅ 0.21159 atm

Thus; the pressure drop is 0.21159 atm

4 0

3 years ago

You will create three classes, the first two being Student and LineAtOfficeHour. The instances of the first class defines a sing

White raven [17]

Answer:

Complete solution is given below:

Explanation:

//student class

class Student{

private String firstname,lastname;

//constructor

Student(String first,String last){

this.firstname=first;

this.lastname=last;

}

//getters and setters

public String getFirstname() {

return firstname;

}

public void setFirstname(String firstname) {

this.firstname = firstname;

}

public String getLastname() {

return lastname;

}

public void setLastname(String lastname) {

this.lastname = lastname;

}

//function to get the fullname of student

public String fullName() {

return this.firstname+" "+this.lastname;

}

}

//class for line at office hour

class LineAtOfficeHour{

private Student line[];

private int N=0;

private int back=0;

//empty constructor

LineAtOfficeHour() {

line=new Student[5];

}

//parameterized constructor

LineAtOfficeHour(Student st[]) {

int i=0;

line=new Student[5];

while(i<st.length && i<5) {

line[i]=st[i];

i++;

}

this.N=i;

this.back=i-1;

}

//function to check if line is empty or not

public boolean isEmpty() {

if(this.N==0)

return true;

else

return false;

}

//function to check if line is full

public boolean isFull() {

if(this.N==5) {

return true;

}else

return false;

}

///function to get the size of line

public int size() {

return this.N;

}

//function to add a student to the line

public void enterLine(Student s) {

if(isFull())

System.out.println("Line is full!!!!");

else {

line[++back]=s;

this.N++;

}

}

public Student seeTeacher() {

Student result=null;

if(this.N>=0) {

result=line[0];

int i=0;

for(i=1;i<N;i++) {

line[i-1]=line[i];

}

line[i-1]=null;

this.N--;

this.back--;

}

return result;

}

//function to print students in line

public String whosInLine() {

String result ="";

for(int i=0;i<this.N;i++) {

result+=line[i].fullName()+",";

}

return result;

}

}

//driver method

public class TestLine {

public static void main(String[] args) {

LineAtOfficeHour list=new LineAtOfficeHour();

if(list.isEmpty()) {

System.out.println("Line is empty!!!!!!!!!");

}

Student s1[]=new Student[3];

s1[0]=new Student("John","Smith");

s1[1]=new Student("Sam","Zung");

s1[2]=new Student("Peter","Louis");

list=new LineAtOfficeHour(s1);

if(list.isEmpty()) {

System.out.println("Line is empty!!!!!!!!!");

}else {

System.out.println("Line is not empty.........");

}

System.out.println("Students in line: "+list.whosInLine());

System.out.println("Student removed: "+list.seeTeacher().fullName());

System.out.println("Students in line: "+list.whosInLine());

}

}

6 0

4 years ago

What are the 4 types of electricity?

olchik [2.2K]

Answer:

Fossil Fuels 67% (Non-Renewable Source): Coal 41%, Natural Gas 21% & Oil 5.1%

Renewable Energy 16%

Mainly Hydroelectric 92%: Wind 6%, Geothermal 1%, Solar 1%

Nuclear Power 13%

Explanation:

3 0

3 years ago

A Medical Bioengineering student is tasked with performing signal analysis.

inna [77]

Answer: I will ask my dad he knows

Explanation:

7 0

4 years ago