Answer:
Mass of second object will be 15 kg
Explanation:
We have given mass of first object = 12 kg
Acceleration 
According to second law of motion we know that force F = MA
So force 
As the same force is applied to the second object of acceleration 
So force = ma

m = 15 kg
So mass of second object will be 15 kg
Answer:
electromagnet: A magnet made of an insulated wire coiled around an iron core (or any magnetic material such as iron, steel, nickel, cobalt) with electric current flowing through it to produce magnetism. The electric current magnetizes the core material.
Explanation:
A recurring illness. Typically lasts for a very long time and are very hard to remove.
The answer is solar flare ; an eruption of high - energy radiation from the sun.