Hardness
Hardness.
Pulverizing an aspirin tablet is a physical change (it is not a property at all). The chemical nature of the aspirin does not change when it is pulverized.
Grinding quartz crystals down to produce sand is an example of physical change. When you grind quartz down to sand, you change the physical appearance of the quartz.
If put under enough pressure it will turn into diamond. Pencil-lead is graphite these days, and some companies grind it into a powder for use as a lubricant.
Lets say you had wood. You can grind around the surface of the wood to make its texture softer or use a saw to cut the wood so each separate piece has a smaller mass. However, after these changes, you still have the same substance as before (in this case, wood) ^_^
People grind grain into flour in a mill.
Physical
When you don't really change something except in this case it has been made smaller, it is a physical change. If you grind down a diamond into small diamond particles, you still have a diamond but in smaller bits.
You grind a diamond by using drills or a diamond grinding cup wheel. A diamond grinding cup wheel is a metal-bonded diamond tool with diamond segments welded or cold-pressed on a steel.
What materials of the Blades is? If you need to grind Tungsten Carbide Blades, the Diamond Grinding-wheels should be your Best Choice. If you need to grind High Speed Steel Blades, Alloy Steel Blades or other steel blades, CBN Grinding-wheels should be your good choice. YingLong SuperHard Materials Manufactory is factory of Typed Grinding-wheels.
Pulverizing an aspirin tablet is a physical change (it is not a property at all). The chemical nature of the aspirin does not change when it is pulverized.
Some windmills were made to grind flour others were made for other purposes.
No. A diamond can only be cut and polished using tools tipped with diamond material.
Diamond grinding wheels need to be abrasive so that they can grind the diamond. Diamond is a very hard substance, after all.
Mastication (when teeth cut and grind food) is a physical change.
yes you can grind rocks. it is done when they shape and polish dimension stone such as granite tops. it is also done when preparing thin sections for geological analysis of rocks and minerals via a microscope. to grind a rock it would require the use of a diamond tipped blade.
Physical way: Grind the ore to finest powder. Pan (add water and rotate horizontally) Chemical way: Grind and exert chemical solvents
Grind