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Mrac [35]
3 years ago
10

According to Moh's hardness scale, your fingernail would be rated as 2.5. Juan and Carol are trying to identify an unknown miner

al. Carol can scratch the mineral sample with her fingernail. Juan and Carol know the mineral MUST be one of these four choices.
Based on the scratch test, the mineral is
A) apatite.
B) calcite.
C) gypsum.
D) pyrite. '
heres a pic if u need it
Mohs Scale of Mineral Hardness
Hardness Mineral Absolute Hardness
1 Talc 1
2 Gypsum 2
3 Calcite 9
4 Fluorite 21
5 Apatite 48
7 Quartz 100
8 Topaz 200
help plz! i couldnt get the table things but that was part of it though!
Chemistry
2 answers:
Tresset [83]3 years ago
7 0
C) 
Should Be The Right Answer
Hopes This Helps Yeah
mamaluj [8]3 years ago
3 0
I believe C is the answer because it is softer than your fingernail and the rest are harder.
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Explanation:

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       q = 600 gpm \times \frac{0.000063 m^{3} s^{-1}}{1 gpm}

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    Diameter = 8 in \times \frac{0.0254 m}{1 in}

                   = 0.2032 m

Relation between area and diameter is as follows.

           A = \frac{\pi}{4} \times D^{2}

               = \frac{3.14}{4} \times (0.2032 m)^{2}

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Also,     q = A × V

or,         V = \frac{q}{A}

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As, viscosity of water = 1 cP = 10^{-3} Pa-s

Density of water = 1000 kg/m^{3}

Therefore, we will calculate Reynolds number as follows.

 Reynolds number = \frac{D \times V \times density}{viscosity}

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Hence, the flow will be turbulent in nature.

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