High Pressures is the wrong answer. The correct asswer would be cooler tempeture.
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Brittle deformation is favored over plastic deformation in situations where the material is under low temperature, high strain rate, low confining pressure, or lacks ductility. Additionally, brittle deformation occurs in materials with strong atomic bonds that tend to fracture rather than deform permanently.
The deformation would increase because the force increases.
Brittle is an adjective. The noun form would be brittleness.
Aptness to break; fragility.
No, iron is a strong and durable metal that is not brittle like glass, so it is unlikely to shatter if dropped on a typical surface. However, repeated drops or a drop from a significant height could still cause deformation or damage to the iron object.
Quartzite is generally harder and more resistant to breakage compared to sandstone. Quartzite is a metamorphic rock that has undergone high heat and pressure, making it more durable and less prone to fracturing. Sandstone, on the other hand, is a sedimentary rock that is softer and more easily eroded, making it more likely to break.