Question

A . answer in detail
1. how will you identify material based on their hardness . give examples. ​

Answer 1

Explanation:

Hardness is the ability of a material to resist deformation, which is determined by a standard test where the surface resistance to indentation is measured. The most commonly used hardness tests are defined by the shape or type of indent, the size, and the amount of load applied.

Answer 2

Answer:

you can easily scratch some material why cannot be scratched so easily material which can be compressed or scratched easily are cal soft while some other materials which are difficult to compress are called hard.

Explanation:

Example :cotton and sponge are soft while iron is hard.