An ore sample weighs 16.0 n in air. when the sample is suspended by a light cord and totally immersed in water, the tension in the cord is 11.4 n. find the total volume and density of the sample?

0.00049 m³

3328.54854 kg/m³

Explanation:

W = Weight of ore = 16 N

T = Tension of cord = 11.4 N

B = Buoyant force

g = Acceleration due to gravity = 9.81 m/s²

= Density of water = 1000 kg/m³

As all the forces are conserved

Volume is given by

The volume of the sample is 0.00049 m³

Density is given by

The density is 3328.54854 kg/m³

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.