glass is a bad counductor of heat, so at first the glass flasks expands and its volume inside increases. the liquid which has not started to expand yet, drops to fill the extra volume inside
Glass expands and contracts according to the ambient temperature.
because metal will expand when it has been heated up
Heat causes the metal to expand, thus breaking the seal.
Glass can be heated without breaking by gradually increasing the temperature to allow the glass to expand uniformly, and then slowly cooling it down to prevent sudden temperature changes that can cause it to break.
Yes, when glass is heated, its molecules become more energetic and vibrate more, causing the glass to expand. This expansion is reversible, meaning that the glass will contract back to its original size once it cools down.
Glass can be heated without cracking by gradually increasing the temperature and allowing it to cool slowly to prevent thermal shock. This process helps the glass to expand and contract evenly, reducing the risk of cracking.
Glass expands when heated because the heat causes the glass molecules to move more vigorously, increasing the distance between them. This expansion is reversible, meaning the glass will contract back to its original size once it cools down.
No. Heating and cooling do not change the mass of an object. Changes in temperature very often change the volume of an object, however, which means that the density of the object changes. Heating usually causes an object to expand, which means that its density goes down. Its mass, and therefore its weight, does not change.
The empty glass is broken first.
Yes, because if glass is heated it breaks, if glass is not heated it doesn't break.
Yes glass does expand a little with heat but it contacts more when cold and can crack if not carefully watched.
Glass expands when heated and contracts when cooled; however, if it is cooled or heated too quickly, it is likely that it will not contract or expand at a uniform rate, and this produces stress in parts of the glass, which can cause it to crack or even explode if the temperature change is even more abrupt. Because of this, lab glassware is often made of boron silicate glass, which is much more resistant to abrupt temperature changes than regular glass. Keep in mind though, that it is still vulnerable to the previously stated effect, though less than regular glass.