We started the class with a thermal expansion activity.
Professor Mason heated up a ring to prove that the atoms within each layer tend to expand outwards. For this reason, the ball was able to get through the ring.
Also professor Mason heated up a bimetallic strip, which one side is made of brass while the other is made of invar. First, he heated the brass side. The result showed that the strip curves to the invar side because the alpha of the brass is bigger. For this same reason, he heated the invar side, which will lead to the same result.
When the bimetallic strip cooled down, it bended to the other side, the brass side.
We determined the linear coefficient of thermal expansion of the above set up by using vapor as a source of heat.
The uncertainty I got was 4.63x10^-6. Therefore, the final result of the experiment should be 1.85x10^-5 +/- 4.63x10^-6.
The next experiment was heating water. This is the actual graph of water being heat. We noted that it is not straight lines.
These were adding heat problems.
This was the last experiment, the idea was to calculate the pressure of a column of liquid by blowing through one hole of a manometer. We blow three times at different rates. Our results are at the table above. This day we learnt about all properties of thermal expansion and how different metals react towards temperature. In addition, we also learnt about latent heat of fusion, and vaporization of ice and water.
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