i belive the answe is c and if im wrong im tarrably sorry
Reflection. I used the process of elimination. Cleavage and color are properties of a mineral and magnetism is a property as well you just can’t find strong traces of it in all minerals. But it’s there no matter how weak or strong it’s attraction is drawn to magnetic fields.
Answer:
Radius, r = 0.00523 meters
Explanation:
It is given that,
Magnetic field, 
Current in the toroid, I = 9.6 A
Number of turns, N = 6
We need to find the radius of the toroid. The magnetic field at the center of the toroid is given by :

r = 0.00523 m
or

So, the radius of the toroid is 0.00523 meters. Hence, this is the required solution.
Igneous rocks are formed from solidification and cooling of magma. The magma can be obtanied from partial melts of pre-existing rocks in either the planet's mantle or crust. Plutonic or intrusive rocks area result of when the magma cools and crystallizes slowly within the Earth's crust. A example is granite.