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
IrinaK [193]
4 years ago
5

During 3 hours one winter afternoon, when the outside temperature was 11°C, a house heated by electricity was kept at 20°C with

the expenditure of 54 kwh (kilowatt·hours) of electric energy.
What was the average energy leakage in joules per second (watts) through the walls of the house to the environment (the outside air and ground)?
Physics
1 answer:
jasenka [17]4 years ago
8 0

Answer:

Explanation:

Since the temperature difference between inner and outside temperature remains constant , condition of steady state has been achieved . So heat produced is equal to heat leaked

heat leaked = heat produced

heat produced  = 54 kwh = 54 x 1000 x  60 x 60 J  

time taken  = 3 x 60 x 60 s

heat produced per second

= 54 x 1000 x  60 x 60 / 3 x 60 x 60

= 18000 J /s

heat leaked = 18000 J /s

You might be interested in
3. Apple juice is an example of a(n) ________. (SC.8.P.8.9)
trapecia [35]

Answer:

The answer is definitely Water

8 0
3 years ago
If we increase the distance traveled when doing work, and keep all other factors the same, what will happen?
stepladder [879]

Answer: D

Explanation:

A -amount of work

F-force

s-distance

If you keep same Force(F) and increase distance(s), amount of work will increase, according to:

A=F*s

8 0
4 years ago
The reaction of magnesium ribbon with oxygen.what is the product formed?
zaharov [31]
When oxygen reacts with magnesium thenMgO3 is formed.

Mg +O2----> MgO3
6 0
3 years ago
Does an object in rest have potential energy
kenny6666 [7]
Yes, of course! by it's definition the potential energy is an energy that particle have in order to obtain kinetic energy. Or simply an energy to make some movement.
4 0
4 years ago
How to convert 7500kilometers to meters​
Kazeer [188]

Answer:

7500000 metres

Explanation:

1 kilometre = 1000 metres

so 7500 kilometres would equal to 7500000 metres

7 0
3 years ago
Other questions:
  • Astronaut rachel leaves earth in a spaceship at a speed of 0.960c relative to an observer on earth. rachel's destination is a st
    13·1 answer
  • The word inverse means ____ and is an alternative word for __________ relationship.
    7·1 answer
  • When you stretch a spring 20 cm past its natural length, it exerts a force of 8
    7·2 answers
  • Derrick crawls 4 feet south, and then turns east and crawls 6 feet.
    9·1 answer
  • Describe one way that the student can determine the exact volume of one of the three blocks
    7·1 answer
  • If the 1kg standard body is accelerated by only f1=(3.O)+(4.0) and f2=(-2.0)+(-6.0) then what is fnet(al in unit vector notation
    6·1 answer
  • 16. If you walk 3 kilometers in 30 minutes, what is your average speed in kilometers per hour?
    13·1 answer
  • If his Christmas lights were wired as a, blank circuit instead of a blank circuit he could avoid this headache
    15·1 answer
  • _______ is the natural science that involves the study of matter and how it moves
    14·2 answers
  • In a competition, weightlifter 1 lifts a 100 kg weight from the floor. Weightlifter 2
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!