I need a scientific answer, what happens the glass when it heats up, what about when it cools down?
2007-01-16 00:11:52 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Physics
When any substance cools down, it shrinks (the opposite is true when a substance is heated).
If a bulb is switched off and allowed to cool slowly, it shrinks slowly, but if water is splashed on it, it cools and shrinks too rapidly. This is what shatters it.
2007-01-16 00:18:52 · answer #1 · answered by bonshui 6 · 1⤊ 0⤋
when the bulb glows the tempreture of the filament becomes very hot which increases the tempreture of the inner glass. Since glass is a poor conductor the temp felt outside is quiet less as compared to inner side, so when cold water is poured over it the outer layer shrinks rapidly since the outer layer shrinks while the inner layer remains expanded the glass breaks.
2007-01-16 01:22:23 · answer #2 · answered by divas 3 · 1⤊ 0⤋
Because when hot glass gets cold water splashed on it, the rapid contraction of the glass causes it to shatter.
2007-01-16 00:18:23 · answer #3 · answered by Anonymous · 0⤊ 0⤋
Differential expansion between the suddenly cooled outer layer, which contracts, while the still hot inner layer does not, resulting in fracturing.
2007-01-16 02:34:29 · answer #4 · answered by CLICKHEREx 5 · 0⤊ 0⤋