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Which Wheel Works Best? An Exploration Into Skateboarding

Determine if the material and the tensile strength of different types of skateboard wheels significantly affects the friction co-efficient- and therefore the velocity- of a skateboarder.It is an educa ...

The Mohs Test: How to Compare the Hardness of Minerals

Some minerals are harder than others because of how strongly their atoms are bound together at the molecular level. How do we find out which minerals are harder and which are softer?It is an education ...

The Scratch Test: Testing a Rock's Hardness

Minerals have many different properties. These properties are used to classify minerals and to help in knowing how minerals can be used. Some of the properties of minerals include hardness, color, shi ...

Physical Properties of Matte? At grade

Definition of physical property and examples of the physical properties of matter.

It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).

Mineral Identificatio? Basic

Classifying minerals based on physical characteristics.

It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).

Mineral Identificatio? At grade

Classifying minerals based on physical characteristics.

It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).

Sapphire Cell Phone Screens? At grade

Learn why sapphires might provide the basis for tougher cell phone screens in the near future.

It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged ...

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