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
pantera1 [17]
3 years ago
10

A solid concrete wall 4.0 m by 2.4 m and 30 cm thick, with a thermal conductivity of 1.3 w/(m·k), separates a basement at 18°c f

rom the ground outside at 6°c. how much heat flows through the wall in one hour?
Mathematics
1 answer:
Nastasia [14]3 years ago
5 0
<span>THE AREA OF THE ROOM IS :A=4*2.4=9.6 m^2
THICKNESS t=0.30 m
DIFFERENCE IN TEMPERATURE dT=18-6=12
q=kAdT/dx=kA*dT/t
q=1.3(9.6)(12)/0.30=4992 W=499.2 J/s
In 1 hour or 3600 sec
P=q*T=(499.2 J/s)(3600 s)=1797120 J=1.8 MJ
1.8MJ OF HEAT FLOWS HTROUGH THE WALL IN ONE HOUR</span>
You might be interested in
Three of these fractions are equivalent: B. 12 C . 21 D. 74 30 A. . 70 Which one is the odd one out?
IrinaVladis [17]

Answer:

12/30

Step-by-step explanation:

Here is the complete question

Three of these fractions are equivalent A.30/70 B.12/30 C.9/21 D.6/14 which one is the odd one out

to determine the equivalent fractions, convert the fractions to percentage

\frac{30}{70} × 100 = 42.86%

\frac{12}{30} × 100 = 40%

\frac{9}{21} × 100 = 42.86%

\frac{6}{14} x 100 = 42.86%

Another method is to convert the fraction to its simplest form

30/70

To transform to the simplest form. divide both the numerator and the denominator by 10 = 3/7

12/30

To transform to the simplest form. divide both the numerator and the denominator by 6 = 2/5

9/21

To transform to the simplest form. divide both the numerator and the denominator by 3 = 3/7

6/14

To transform to the simplest form. divide both the numerator and the denominator by 2 = 3/7

Using either methods, 12/30 is the odd one out  

4 0
2 years ago
Enter the equation of the line in slope-intercept form.
nordsb [41]

Answer:

y=3x

Step-by-step explanation:

8 0
3 years ago
What is the value of the expression
charle [14.2K]
5 5/30 is the answer to the question.
5 0
3 years ago
Read 2 more answers
Which geometric figures are drawn on the diagram?<br> Check all that apply.
Allisa [31]

Try adding a picture next time maybe...?

7 0
3 years ago
Read 2 more answers
A farmer is building a fence to enclose a rectangular area against an existing wall, shown in the figure below.
mr Goodwill [35]

9514 1404 393

Answer:

  3362 ft²

Step-by-step explanation:

As we saw in brainly.com/question/22284853, the long side of the area will be half the length of the fence: 82 feet. The remaining two sides will be 41 feet each, so the largest area that can be enclosed is ...

  A = LW

  A = (82 ft)(41 ft) = 3362 ft²

7 0
3 years ago
Other questions:
  • Pythagoras was born about 582 bc. Isaac Newton was born in 1643 ad. How many years apart were they born?
    8·1 answer
  • A car is driving northwest at vv mph across a sloping plain whose height, in feet above sea level, at a point nn miles north and
    10·1 answer
  • A red light flashes every 14 minutes. A blue light flashes every 24 minutes. when will the two lights flash together again if th
    7·1 answer
  • What's worth more a 100 dollars or 350 quarters?
    15·1 answer
  • A box of donuts cost $9. You want to send donuts to the local nursing home. Set up an equation to find how many boxes you can se
    15·1 answer
  • PLZ HELP FAST!!
    12·1 answer
  • Help me with this this is confusing <br> give me the answer
    9·1 answer
  • Help fast please.....
    15·1 answer
  • If a Touchdown is worth 7 points and a
    7·2 answers
  • Please help
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!