<span> When a gas is cooled, it contracts. In a sealed environment, the pressure would therefore reduce, as the molecules try to get closer together, that is, push outwards less. But in the atmosphere, the closer-packed molecules (or atoms, of course) make the air more dense, therefore heavier.
If you were at a higher elevation, the cooling is caused by the reduced pressure causing the molecules to move further apart. The temperature reduces about 1 degree Centigrade for every 100metres gain in elevation.
Any good? </span>
Answer:
the answer would be B your welcome
Explanation:
Distillation is a process in many laboratories for the purpose of
separating and/or purifying components of a liquid mixture. The distillation apparatus used consists of
three major parts: <span>distillation flask - to heat the mixture and volatilize the components,
a condenser to cool the vapors back to liquid state, and a collection vessel. The apparatus is typically made of glass and
therefore subject to breakage.</span> <span>All components of the distillation apparatus
should be protected to a stable stand or rack to avoid it from falling over.</span>
Answer:
<em>The equivalent resistance of the combination is R/100</em>
Explanation:
<u>Electric Resistance</u>
The electric resistance of a wire is directly proportional to its length. If a wire of resistance R is cut into 10 equal parts, then each part has a resistance of R/10.
Parallel connection of resistances: If R1, R2, R3,...., Rn are connected in parallel, the equivalent resistance is calculated as follows:
![\displaystyle \frac{1}{R_e}=\frac{1}{R_1}+\frac{1}{R_2}+\frac{1}{R_3}+...+\frac{1}{R_n}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Cfrac%7B1%7D%7BR_e%7D%3D%5Cfrac%7B1%7D%7BR_1%7D%2B%5Cfrac%7B1%7D%7BR_2%7D%2B%5Cfrac%7B1%7D%7BR_3%7D%2B...%2B%5Cfrac%7B1%7D%7BR_n%7D)
If we have 10 wires of resistance R/10 each and connect them in parallel, the equivalent resistance is:
![\displaystyle \frac{1}{R_e}=\frac{1}{R/10}+\frac{1}{R/10}+\frac{1}{R/10}...+\frac{1}{R/10}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Cfrac%7B1%7D%7BR_e%7D%3D%5Cfrac%7B1%7D%7BR%2F10%7D%2B%5Cfrac%7B1%7D%7BR%2F10%7D%2B%5Cfrac%7B1%7D%7BR%2F10%7D...%2B%5Cfrac%7B1%7D%7BR%2F10%7D)
This sum is repeated 10 times. Operating each term:
![\displaystyle \frac{1}{R_e}=\frac{10}{R}+\frac{10}{R}+\frac{10}{R}+...+\frac{10}{R}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Cfrac%7B1%7D%7BR_e%7D%3D%5Cfrac%7B10%7D%7BR%7D%2B%5Cfrac%7B10%7D%7BR%7D%2B%5Cfrac%7B10%7D%7BR%7D%2B...%2B%5Cfrac%7B10%7D%7BR%7D)
All the terms have the same denominator, thus:
![\displaystyle \frac{1}{R_e}=10\frac{10}{R}=\frac{100}{R}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Cfrac%7B1%7D%7BR_e%7D%3D10%5Cfrac%7B10%7D%7BR%7D%3D%5Cfrac%7B100%7D%7BR%7D)
Taking the reciprocals:
![R_e=R/100](https://tex.z-dn.net/?f=R_e%3DR%2F100)
The equivalent resistance of the combination is R/100