Explanation:
The high hardness of quartz, seven on the Mohs Scale, makes it harder than most other natural substances. As such it is an excellent abrasive material. Quartz sands and finely ground silica sand are used for sand blasting, scouring cleansers, grinding media, and grit for sanding and sawing
A wave, since that statement is quite similar to it's definition: an oscillation <span>accompanied by an energy transfer.</span>
Limestone is a kind of Foliated Metamorphic rock.
Answer:
The trains mass in pounds would be 40084.029 if you would round it to the hundreths
Explanation: