Rock dug out from the deep inside earth and refined.
Explanation:
Ores are usually rocks dug out from deep within the earth and refined.
An ore is an aggregate of metalliferous minerals with gangue that can be won at profit under current economic conditions.
Ores are rocks and rocks can be ores if they contain viable economic minerals.
They are usually naturally formed and they contain different minerals.
For example cassiterite is a known ore of tin.
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Rocks brainly.com/question/2817889
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Answer:
<h2>98 J</h2>
Explanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 9.8 m/s²
From the question we have
PE = 5 × 9.8 × 2
We have the final answer as
<h3>98 J</h3>
Hope this helps you
We know the answer doesn't have to do with force because we have not identified a positive or negative axis.
Depending on what the system we are evaluating is, the sign of the work can change.
If work is done on the system, it is negative, but if work is done by the system, it is positive.
If the system we are evaluating is the leash, the work is being done by the leash, and therefore, the work is positive.
If the system we are evaluating is the dog, the work is being done on the dog, and therefore, the work is negative.
The person does not sink into the snow because the force acts on a larger area so that the pressure is less
The edge of the sharp knife has a smaller area so the force acting on the knife produces a larger pressure
