What is the weight of a lunchbox if its mass is 1.2 kg?

0.12 N

Explanation:

Mass is the amount of matter in a substance.

Weight is the amount of gravity acting on the substance.

Kilograms (kg) is a unit of mass.

We use Newtons (N) as a unit for weight.

The conversion factor between kilograms and newtons is:

10 kg = 1 N

To get from kg to N, divide by 10.

1.2 kg ÷ 10 = 0.12 N

Or "zero point one two Newtons".

The weight of a lunchbox which has the mass 1.2 kg is 0.12 N.

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.