1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
bekas [8.4K]
3 years ago
5

The hot water needs of an office are met by heating tab water by a heat pump from 16 C to 50 C at an average rate of 0.2 kg/min.

If the COP of this heat pump is 2.8, the required power input is: (a) 1.33 kW (d) 10.2 kW (b) 0.17 kW (c) 0.041 kW
Engineering
1 answer:
Alex777 [14]3 years ago
7 0

Answer:

option B

Explanation:

given,

heating tap water from 16° C to 50° C

at the average rate of 0.2 kg/min

the COP of this heat pump is 2.8

power output = ?

COP = \dfrac{Q_H}{W_{in}}\\W_{in} = \dfrac{Q_H}{COP}\\W_{in} = \dfrac{\dfrac{0.2}{60}\times 4.18\times (50-16)}{2.8}\\W_{in} = 0.169

the required power input is 0.169 kW or 0.17 kW

hence, the correct answer is option B

You might be interested in
Which word from the passage best explains what the web in the passage symbolizes
frez [133]

Answer:

I cant see the passage

Explanation:

I cant see the passage

6 0
3 years ago
Who can help me with electric systems for cars?
hoa [83]

Answer: i can see if i can what is the problem

Explanation:

7 0
3 years ago
I need help on the Coderz Challenge missions 3 part 3. PLEASE HELP!
allsm [11]

Answer:

the answer how you analyzs the problwm

6 0
3 years ago
Read 2 more answers
Given a matrix, clockwise-rotate elements in it. Please add code to problem3.cpp and the makefile. Use the code in p3 to test yo
rusak2 [61]

Answer:

/* C Program to rotate matrix by 90 degrees */

#include<stdio.h>

int main()

{

int matrix[100][100];

int m,n,i,j;

printf("Enter row and columns of matrix: ");

scanf("%d%d",&m,&n);

 

/* Enter m*n array elements */

printf("Enter matrix elements: \n");

for(i=0;i<m;i++)

{

 for(j=0;j<n;j++)

 {

  scanf("%d",&matrix[i][j]);

 }

}

 

/* matrix after the 90 degrees rotation */

printf("Matrix after 90 degrees roration \n");

for(i=0;i<n;i++)

{

 for(j=m-1;j>=0;j--)

 {

  printf("%d  ",matrix[j][i]);

 }

 printf("\n");

}

 

return 0;

 

}

5 0
3 years ago
HELP PLEASE!!!!!!!!!!!
MAXImum [283]
C is your answers!!!!!$3&2)//
7 0
3 years ago
Read 2 more answers
Other questions:
  • In a fluid power system, if energy is not transferred to work, what form does it take?
    6·1 answer
  • List irreversibilities
    11·1 answer
  • 1. Which type of fit implies that a piece will never fit? a. interference fit b. construction fit c. transition fit d. impeding
    8·1 answer
  • Create a program named IntegerFacts whose Main() method declares an array of 10 integers.Call a method named FillArray to intera
    12·1 answer
  • The decay of a radioactive isotope can be theoretically modeled with the following equation, where C0 is the initial amount of t
    6·1 answer
  • A football player attempts a 30‐yd field goal. If he is able to impart a velocity u of 100 ft/sec to the ball, compute the minim
    6·1 answer
  • Which of the following is NOT a true statement about construction drawings?
    5·1 answer
  • Explain the proper uses of shop equipment. (explain to me how to use 3 pieces of shop equipment.)
    7·1 answer
  • HOLA COMO ESTAN TODOS
    14·1 answer
  • A ____ is either in the pressure reducer or in the downstream side of the system to ensure that the control air pressure does no
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!