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Oxana [17]
3 years ago
5

The picture below shows a soil texture triangle.

Physics
1 answer:
lys-0071 [83]3 years ago
4 0
Referring to the given diagram, we will find that the percentage of sand in silt is given on the base of the triangle.
The amount of sand is almost 50% of silt. Representing this on the percentage line, we will find that the percentage of sand is somewhere between the 40% and the 60%.

Based on the above, the best choice would be:
c. 40 percent to 60 percent
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C

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A) 350 J

- The initial internal energy of the cup is

U_i = 230 J

- The final internal energy of the cup is

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According to the first law of thermodynamics:

U_f - U_i = Q+W

where

Q is the heat absorbed by the system

W is the work done on the system

The work done on the system in this case is 0, so we can rewrite the equation as

U_f - U_i = Q

And so we find the heat transferred

Q=580 J - 230 J=350 J

B) IN the cup

Explanation:

in this situation, we see that the internal energy of the cup increases. The internal energy of an object/substance is proportional to its temperature, so it is a measure of the average kinetic energy of the molecules of the object/substance. Therefore, in this case, the temperature (and the energy of the molecules of the substance) has increased: this means that heat has been transferred INTO the system from the environment (the heat came from the sun).

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