The hardness of a steel nail is about 5.5 a certain mineral scratches a steel nail but does not scratch quartz. What could the hardness of mineral be

Pick any answer between 5.5 and 7. If you have 6 choose it.

Explanation:

Quartz has a hardness of 7.

The steel ball is 5.5

The mineral must be between these two values. Written mathematically

5.5 < x < 7

So pick any value that is between 5.5 and 7.  The other choices would be valuable.

hey there!

so, when you eat, your teeth chew and grind food into smaller pieces. this is mechanical digestion. then reactions aided by digestive enzymes break down large food molecules into smaller molecules. this is chemical digestion. the two processes change the food into simpler substances that can be used by the body for raw materials and energy.

hope this

tobey

answer; ///stratum basale///stratum spinosumstratum granulosumstratum lucidumstratum corneum; 2,1,5,4,3