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but Jisu bro, how do we know the expansion of the flask has an effect so much so that the level of the liquid in it falls
ok,
so..
theres definitely a drop since da solid receives heat first, it expands
comprendez??
movin on, da increase wont be too large or too small
but hello we r talkin abt physics here
anythin dat happens counts
hav a lk at da extract from wiki...pay attention to da highlighted part
i'm a 100% sure abt dis cuz i've asked ma teacher to go thru these small areas...
all in all, we cant satisfy ourselves until we get our hands on da markin schemes
hehe
heres da extract:
For example, a flask, that has been constructed with a long narrow stem filled with enough liquid that the stem itself is partially filled, when placed in a heat bath will initially show the column of liquid in the stem to drop followed by the immediate increase of that column until the flask/liquid/heat bath system has thermalized. The initial observation of the column of liquid dropping is not due to an initial contraction of the liquid but rather the expansion of the flask as it contacts the heat bath first. Soon after, the liquid in the flask is heated by the flask itself and begins to expand. Since liquids typically have a greater expansion over solids the liquid in the flask eventually exceeds that of the flask causing the column of liquid in the flask to rise.
hope i helped