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michael60622
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Does anyone know the name of a type of rock that gives off a static charge when hit, like struck with a hammer?
technician said:The first thing that comes to mind for me is the piezo-electric effect.
This occurs in some crystals (barium titanate... I think) when they are struck or squeezed a voltage is generated.
Flint is the prototypical example. Other types of chert will do, as will many other very hard types of rock such as jasper.michael60622 said:Does anyone know the name of a type of rock that gives off a static charge when hit, like struck with a hammer?
D H said:Flint is the prototypical example. Other types of chert will do, as will many other very hard types of rock such as jasper.
When a rock is struck against another object, it creates friction which can cause electrons to transfer from one object to another. This transfer of electrons is what creates a static charge.
No, not all rocks have the same composition and therefore may not have the same ability to create friction and transfer electrons. However, many types of rocks such as quartz, sandstone, and flint are known to produce static charge when struck.
In most cases, the level of static charge produced by a struck rock is not strong enough to cause harm to humans or other living organisms. However, it is always important to exercise caution and avoid touching objects that may have a strong static charge.
The duration of the static charge from a struck rock can vary depending on factors such as the type of rock and the humidity in the environment. In general, the charge will dissipate over time as the electrons eventually balance out between the two objects.
Yes, it is possible for a rock to give off static charge without being struck. This can occur if the rock is rubbed against another surface or even when it is simply moved or touched by an object with a different electrical charge.