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LenKa [72]
3 years ago
6

A can of soft drink at room temperature is put into the refrigerator so that it will cool. Would you model the can of soft drink

as a closed system or as an open system? Explain.
Mathematics
1 answer:
zhannawk [14.2K]3 years ago
4 0

Answer:

closed System

Step-by-step explanation:

Metal is a conductor of heat, coolness, and electricity. In terms of electricity, only closed circuits will work because electricity flows in a closed loop. If the can is being cooled successfully, then the heat is flowing out of the can into the fridge while cool air from the fridge is flowing into the can forming a loop. So the answer is a closed system.  

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Maths question please help !! thank u :)​
nikdorinn [45]

Answer:

1350m

Step-by-step explanation:

Let the distance ran by Denise, Farah and Elaine be D, F and E meters respectively.

From the given information,

D= ⅔(E +F) -----(1)

E= ½(D +F) -----(2)

Let's get rid of the fraction so the equations are much easier to work with.

From (1):

3D= 2(E +F) <em>(Multiply both sides by 3)</em>

3D= 2E +2F -----(3) <em>(</em><em>Expand</em><em>)</em>

From (2):

2E= D +F -----(4)

Substitute (4) into (3):

3D= D +F +2F

3D -D= 3F

2D= 3F

Given that Farah ran 360m, F= 360.

2D= 3(360)

2D= 1080

D= 1080 ÷2

D= 540

2E= D +F

2E= 540 +360

2E= 900

E= 900 ÷2

E= 450

Total distance the 3 girls ran

= D +F +E

= 540 +360 +450

= 1350m

Alternatively, you could start by substituting F= 360 to equations (1) and (2).

6 0
3 years ago
A store had 175 cell phones in the month of January. Every month, 10% of the cell phones were sold and 10 new cell phones were s
kotegsom [21]
Thank you for posting your question here at brainly. Feel free to ask more questions.  

The best and most correct answer among the choices provided by the question is <span>(D) f(n) = 0.9 * f(n - 1) + 10, f(0) = 175, n > 0 .</span> <span>       
    </span><span>
Hope my answer would be a great help for you.</span>
4 0
4 years ago
Read 2 more answers
PLEASE HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 20PTS
3241004551 [841]
Hello,


The answer to this question would be B. A right scalene triangle is a "Triangle" that has a right angle into it.C would not be the answer b/c is has an obtuse angle,and So does D. So the answer is not D,So dont pick D b/c I see that you have it marked.

Hope this helps
8 0
4 years ago
PLEASE HELP!! Given a situation you can construct a linear function?
SVETLANKA909090 [29]
The number of people that own pets???
5 0
4 years ago
Read 2 more answers
What is the perimeter of a rectangle with sides 3 ft and (c+4) ft?
Alika [10]

Answer:

(2c+14) ft

Step-by-step explanation:

The answer is (2c+14) ft because as 2 sides measure 3 feet, we have 6 feet for two sides. The other two sides measure (c+4) feet, and there is (2c+8) feet for two sides. If you add the results together, you get (2c+14) feet. Hope it helps!

7 0
4 years ago
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