Well the top three hardest are Diamond, Sapphire and Ruby, and an easy way to remember is: red-white & blue stones! The hardness of a gemstone is measured on its place on Mohs scale of hardness. 10 on Mohs scale being the hardest known naturally occurring substance– and the honor goes to the diamond
Although the hardest natural stone on the planet is a diamond that is rated ten on the Mohs scale, granite is known as the most durable and hardest natural stone that is used in construction material and is measured six on Mohs scale.
The hardest mineral commonly found in granite is quartz, which is normally a somewhat translucent, white to grey colored mineral.
<em>(</em>so from your options granite is the hardest to scratch <em>)</em>
hope it helps you
:)
You sure thats the correct answer?
Understand course content
GPS stands for Global Positioning System. GPS uses satellites that orbit Earth to send information to GPS receivers that are on the ground. The information helps people determine their location.
A geographic information system (GIS) is a system designed to capture, store, manipulate, analyze, manage, and present all types of geographical data. Attribute data can be generally defined as additional information about each of the spatial features.
Answer:
Choose a point on the graph to find the value of the derivative at. Draw a straight line tangent to the curve of the graph at this point. Take the slope of this line to find the value of the derivative at your chosen point on the graph.
Explanation:
The derivative measures the steepness of the graph of a function at some particular point on the graph. Thus, the derivative is a slope.
