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levacccp [35]
3 years ago
6

The diagram is being used to illustrate the second law of thermodynamics, where Qh represents a hot object and Qc represents a c

old object.
A black box on the left labeled Q Subscript h Baseline and a touching white box on the right labeled Q Subscript c Baseline.

Which will best complete the diagram to illustrate the law?

adding in the boxes an arrow that points from Qh to Qc
adding in the boxes an arrow that points from Qc to Qh
adding in the boxes an arrow that points in both directions between Qh and Qc
adding in each box an arrow that points upward from Qh and from Qc

The correct answer is A. adding in the boxes an arrow that points from Qh to Qc
Physics
2 answers:
sdas [7]3 years ago
9 0

Answer:

Adding in the boxes an arrow that points from Q_{h} to Q_{c}.

Explanation:

According to the Second Law of Thermodynamics,<em> the heat transfer occur from a higher temperature body to a lower temperature body</em>.

So, applying the Second Law of Thermodynamics, the correct answer is the first one: Adding in the boxes an arrow that points from Q_{h} to Q_{c}; because this direction is pointing the right one, it doesn't violate the second law of the thermodynamics, the heat is gonna go from Q_{h} to Q_{c}, and the arrow indicates that.

Remember that the problem states that Q_{c} is a cold object and Q_{h} is a hot object.

katrin [286]3 years ago
6 0

Answer:

The answer is A. on edgen.

Explanation:

A. adding in the boxes an arrow that points from Qh to Qc

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The current theory of the structure of the
IRISSAK [1]

1) The mass of the continent is 3.3\cdot 10^{21} kg

2) The kinetic energy of the continent is 624 J

3) The speed of the jogger must be 4 m/s

Explanation:

1)

We start by finding the volume of the continent. We have:

L = 5850 km = 5.85\cdot 10^6 m is the side

t = 35 km = 3.5\cdot 10^4 m is the depth

So the volume is

V=L^2 t = (5.85\cdot 10^6)^2 (3.5\cdot 10^4)=1.20\cdot 10^{18} m^3

We also know that its density is

d=2750 kg/m^3

Therefore, we can find the mass by multiplying volume by density:

m=dV=(2750)(1.20\cdot 10^{18})=3.3\cdot 10^{21} kg

2)

The kinetic energy of the continent is given by:

K=\frac{1}{2}mv^2

where

m=3.3\cdot 10^{21} kg is its mass

v = 3.2 cm/year is the speed

We have to convert the speed into m/s. We have:

3.2 cm = 0.032 m

1 year = 1(365)(24)(60)(60)=3.15\cdot 10^7 s

So, the speed is:

v=\frac{0.032 m}{3.15 \cdot 10^7 s}=1.02\cdot 10^{-9} m/s

So, we can now find the kinetic energy:

K=\frac{1}{2}(1.20\cdot 10^{21})(1.02\cdot 10^{-9})^2=624 J

3)

Here we have a jogger of mass

m = 78 kg

And the jogger has the same kinetic energy of the continent, so

K = 624 J

The kinetic energy of the jogger is given by

K=\frac{1}{2}mv^2

where v is the speed of the jogger.

Solving for v, we find the speed that the jogger must have:

v=\sqrt{\frac{2K}{m}}=\sqrt{\frac{2(624)}{78}}=4 m/s

Learn more about kinetic energy:

brainly.com/question/6536722

#LearnwithBrainly

3 0
3 years ago
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