What is the name of the scale that is used to test the hardness of a mineral? ?

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Your question: What is the name of the scale that is used to test the hardness of a mineral?

Your The scale that is used to text the hardness of a mineral is called

A Mohs Hardness Test!.

Any questions^ ?

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W= fd
where f is an applied force and d is the distance over which it is applied. when a parachuting skydiver is at constant velocity, he is experiencing "terminal velocity", the point at which his acceleration down is canceled out by air resistance. that means that the resisting force of the air is equal to his weight, but in the opposite direction. with this, we can solve for the work done by the force.
w = fd
w = (92.0)(9.81 m/s^2) (325)
w= 2.93 x 10^5 j
the value for work in this case is positive because it is pushing up on the skydiver, who has a downward force of gravity.
therefore the answer is 2.93 x 10^5 j