We know that an object floats in a fluid if the density of the object is less than the density of the fluid. When some air or water is heated, it expands. That makes its density less than cooler air or water, so it floats in them.
This is basically Michael Faraday's law and this is known as electromagnetic induction
That's all I know
So you would divide 1530 by 8 and that’s how you’d get your answer, so it should be (blank)m