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Explanatioblasting. In this process, mineralization is obtained from the ground using surface and/or underground mining methods. These methods are fairly described together with loading and hauling equipment. Transition from surface mining to underground mining is also considered. To illustrate the development of each mining method, several case studies are included in the text. With regard to drilling and blasting, drilling methods, types of industrial explosives, and blast design are discussed. The last heading of the chapter is devoted to grade control, which is essential to the economics?

Explanation:

These tools were used for hunting, cutting flesh and for digging earth. After several thousand years, they began to make fine pieces from hard stone. These pieces were called 'microliths'. These microliths were attached to wooden or bone handles and were used as knives and arrows.

Answer:

Stone tools were important in hunter-gather societies. Obviously, they made life a lot easier and helped them survive. Beyond that, however, stone tools had cultural value.

Explanation:

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Explanation:

No. of atoms= No. of moles of compound× Avogadro No. × Atomicity

Hydrogen atoms = 1 × 6.022 × 10^23 × 2

= 12.044 × 10^23

Oxygen atoma = 1 × 6.022 × 10^23 × 1

= 6.022 × 10^23

Total Atoms = 12.044 × 10^23 + 6.022 × 10^23

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Answer:

80° , 100° , 100°

Step-by-step explanation:

•Sum of adjacent angles of rhombus = 180°

•Opposite angles of rhombus are equal.

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