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3 years ago

Can i join three 12 volts batteriesto give me 24 volts output

Engineering

1 answer:

bulgar [2K]3 years ago

8 0

Answer:

YES

Explanation:

If we connect batteries in series then the output voltage is the sum of the individual voltage of each battery i.e if you connect three 12 volts batteries in series then their output voltage will be 12+12+12=36 volts, but the current rating of the batteries in series will be same of the individual battery rating in 'mah'.

But when we connect the batteries in parallel their voltage is not added but their current rating in mah is addition of their individual rating.

So, If you want 24 volts from three 12 volts battery then you can connect two of them in series and the other one in parallel with them this will give 24 volts and the current will be addition of the two series batteries and the third which is in parallel with them. You can use this configuration if current value is not a big factor.

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At steady state, a reversible refrigeration cycle discharges energy at the rate QH to a hot reservoir at temperature TH, while r

ludmilkaskok [199]

Answer:

a) $COP_{R} = 25.014$ , b) $T_{H} = 327.78\,K\,(54.63\,^{\textdegree}C)$

Explanation:

a) The coefficient of performance of a reversible refrigeration cycle is:

$COP_{R} = \frac{T_{L}}{T_{H}-T_{L}}$

Temperatures must be written on absolute scales (Kelvin for SI units, Rankine for Imperial units)

$COP_{R} = \frac{275.15\,K}{286.15\,K-275.15\,K}$

$COP_{R} = 25.014$

b) The respective coefficient of performance is determined:

$COP_{R} = \frac{Q_{L}}{Q_{H}-Q_{L}}$

$COP_{R} = \frac{8.75\,kW}{10.5\,kW-8.75\,kW}$

$COP_{R} = 5$

But:

$COP_{R} = \frac{T_{L}}{T_{H}-T_{L}}$

The temperature at hot reservoir is found with some algebraic help:

$COP_{R} \cdot (T_{H}-T_{L})=T_{L}$

$T_{H}-T_{L} = \frac{T_{L}}{COP_{R}}$

$T_{H} = T_{L}\cdot \left(1+\frac{1}{COP_{R}} \right)$

$T_{H} = 273.15\,K \cdot \left(1+\frac{1}{5} \right)$

$T_{H} = 327.78\,K\,(54.63\,^{\textdegree}C)$

8 0

2 years ago

Read 2 more answers

An inventor claims to have devised a cyclical power engine that operates with a fuel whose temperature is 750 °C and radiates wa

Phantasy [73]

Answer:

Yes

Explanation:

Given Data

Temprature of source=750°c=1023k

Temprature of sink =0°c=273k

Work produced=3.3KW

Heat Rejected=4.4KW

Efficiency of heat engine(η)= $\frac{Work produced}{Heat supplied}$

and

Heat Supplied ${\left (Q_s\right)}=Work Produced(W)+Heat rejected\left ( Q_r \right )$

${Q_s}=3.3+4.4=7.7KW$

η= $\frac{3.3}{7.7}$

η=42.85%

Also the maximum efficiency of a heat engine operating between two different Tempratures i.e. Source & Sink

η=1- $\frac{T_ {sink}}{T_ {source}}$

η=1- $\frac{273}{1023}$

η=73.31%

Therefore our Engine Efficiency is less than the maximum efficiency hence the given claim is valid.

5 0

2 years ago

Universal Containers uses the Case object to track service tickets. They have implemented Case teams to allow multiple support r

inna [77]

Answer:

Universal Containers uses the Case object to track service tickets. They have implemented Case teams to allow multiple support representatives to manage the Cases. Which two "Filter by owner" options would the user see while creating a list view on the Case object?

Choose 2 answers

A. My Case Teams

B. Roles

C. Public Groups

D. Queue

Correct answer is option A and D

A) My case teams &

D) Queue

Explanation:

Since a case team was implemented to allow multiple support representatives manage the case, the two filter by owner options the user will see are; my case teams and queue.

Queue entails choosing a specific case queue to look at for your view. Which in this case the user will see because the case isn't handled by one person.

In my case teams, cases are filtered to look at only cases where you’re on the case team.

6 0

3 years ago

Whats the boolean expression of this circuit?

Natalija [7]

Answer:

G8 = x0'x2' +x0'x3' +x1x2

Explanation:

The expression can be written different ways, depending on the need to avoid hazards. One of them is ...

$G_8=\overline{X_0}\,\overline{X_2}+\overline{X_0}\,\overline{X_3}+X_1X_2$

A truth table and Karnaugh map are shown for the circuit. The terms used in the Boolean expression come from the corners, the upper half of the left- and right-columns, and the right half of the middle two rows. If a static hazard is to be avoided, a term x1x0' could be added representing the right column.

8 0

2 years ago

Your program must output each student’s name in the form: last name followed by a comma, followed by a space, followed by the fi

Reptile [31]

Answer:

#include <iostream>

#include <string>

#include <fstream>

using namespace std;

char getStudentGrade(int testScore);

//Declare constant max students in file 10

const int maxStudents = 10;

struct StudentType

{

string studentFName;

string studentLName;

int testScore;

char grade;

};

void readStudentData(StudentType students[]){

int i = 0;

ifstream infile;

infile.open("inputStudentData.txt");

while (!infile.eof())

{

infile >> students[i].studentFName;

infile >> students[i].studentLName;

infile >> students[i].testScore;

students[i].grade = getStudentGrade(students[i].testScore);

i++;

}

char getStudentGrade(int testScore){

char grade;

if(testScore >= 80) {

grade = 'A';

}

else if(testScore >= 60) {

grade = 'B';

}

else if(testScore >= 50) {

grade = 'C';

}

else if(testScore >= 40) {

grade = 'D';

}

else {

grade = 'F';

}

return grade;

}

int main()

{

StudentType students[10];

readStudentData(students);

for(int i=0;i<maxStudents;i++) {

students[i].grade = getStudentGrade(students[i].testScore);

}

for(int i=0; i<maxStudents; i++){

cout << students[i].studentLName <<", " << students[i].studentFName << " " << students[i].grade << endl;

}

ofstream outputFile;

outputFile.open ("outputStudentData.txt");

for(int i=0; i<maxStudents; i++){

outputFile << students[i].studentLName <<", " << students[i].studentFName << " " << students[i].grade << endl;

}

outputFile.close();

return 0;

}

3 0

3 years ago

Can i join three 12 volts batteriesto give me 24 volts output​

Can i join three 12 volts batteriesto give me 24 volts output