How long can you boil glass? Over high heat, bring the water to a rolling boil. Leave to boil for 10 minutes. Not 8 minutes.. What happens if you put glass in microwave? Glass that is not microwave safe may have tiny air bubbles that could expand during heating.
High temperature gradients in materials can cause them to crack, especially glass.
Materials expand and contract with temperature. It's a small effect that you won't notice in, say, your car keys, but with big enough chunk of material the expansion can be considerable. This is why bridges are sometimes built with joints - it allows for the different segments of the bridge to expand and contract with the annual temperature cycles and not crack instead.
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Answer:
How long can you boil glass? Over high heat, bring the water to a rolling boil. Leave to boil for 10 minutes. Not 8 minutes.. What happens if you put glass in microwave? Glass that is not microwave safe may have tiny air bubbles that could expand during heating.
Answer:
High temperature gradients in materials can cause them to crack, especially glass.
Materials expand and contract with temperature. It's a small effect that you won't notice in, say, your car keys, but with big enough chunk of material the expansion can be considerable. This is why bridges are sometimes built with joints - it allows for the different segments of the bridge to expand and contract with the annual temperature cycles and not crack instead.