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astra-53 [7]
3 years ago
10

Which of the following can be used to indicate which direction heat transfer will flow between two

Chemistry
2 answers:
QveST [7]3 years ago
5 0
Heat flows from hot to cold
jonny [76]3 years ago
5 0

Answer:

Its temperature

Explanation:

if the cold air wants to move to the hot air, then that means its trying toequal out t=both the temperatures. meaning that the cold air will get hotter and the hot were ill get colder.

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Gasoline has many different types of hydrocarbons. This makes it a mixture.

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vovikov84 [41]
I think the answer would be 2
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What is the muscle that when contracted, it allows the lungs to fill with air?
rosijanka [135]

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It is a large, dome-shaped muscle that contracts rhythmically and continually, and most of the time, involuntarily. Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs.

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Calculate the theoretical density (in g/cm3) of copper (Cu), given that it has the FCC structure. The atomic weight of Cu is 63.
sasho [114]

Answer:

8.937g/cm³

Explanation:

To answer this question we need to know that, in 1 unit FCC cell you have:

Edge length = √8 * R

<em>Volume = 8√8 * R³</em>

<em>And there are 4 atoms per unit cell</em>

<em />

<em>Mass of 4 atoms in g:</em>

4 atom * (1mol / 6.022x10²³atom) * (63.55g / mol) = 4.221x10⁻²²g

<em />

<em>Volume in cm³:</em>

0.1278nm * (1x10⁻⁷cm / 1nm) = 1.278x10⁻⁸cm

Volume = 8√8 * (1.278x10⁻⁸cm)³

Volume = 4.723x10⁻²³cm³

And density is:

4.221x10⁻²²g / 4.723x10⁻²³cm³ =

<h3>8.937g/cm³</h3>

6 0
4 years ago
If a screwdriver was used to pry open a door, where would scratches/striations be found?
scZoUnD [109]

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