By combining the best properties of each material.
The physical properties of nylon and leather that make them good materials for shoelaces is that they are both durable and flexable
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Medicinal chemists study the structural properties of compounds intended for applications to human medicine. Materials chemists study and develop new materials to improve existing products or make new ones.
Magnets can lose their magnetic properties if exposed to high heat or are made subject to high impact. The temperature at which magnets lose magnetic properties is referred to as the Curie Temperature for ferromagnetic materials.
Physicists do help people, even if it's not direct, e.g. without Physicists, there wouldn't be coloured TV, but even though Physicists didn't make the coloured TV, they're research on the three colours red green and blue was essential.
A table could be made from: metal, glass, wood, plastic, or a combinations of materials.
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A mixture is a two or more materials to make properties.
It will have different properties.
The physical properties of nylon and leather that make them good materials for shoelaces is that they are both durable and flexable
They have different properties because the element that make up these compounds are different, water is made up of 2 hydrogen atoms, and 1 oxygen while table salt is made of a sodium and a chlorine atom. These different combinations make up different properties. Why the elements that make up these compounds have different properties however is a different question.
Materials used to make cars include Aluminum, steel, fiberglass, and plastic. Each material is used for making specific parts due to their unique properties.
To ensure that the materials are appropriate for objects that are made out of them. You do not make electricity cables out of ordinary glass or fibre-optic cables out of wood!
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Two make combinations you would take 2x1=2 combinations only
You could make 10*10*10*26*26*26 combinations, or 17576000 combinations.
Assuming you are using the standard English alphabet, the number of combinations you can make are: 26 x 26 = 676 combinations.