Isabella makes an electromagnet by wrapping copper wire around an iron bolt and then connecting each end of the wire to a battery. She observes that the more times that she wraps the copper wire around the bolt, the more paper clips her magnet can pick up. What does she conclude in this experiment?

A
Wrapping more copper wire around the bolt increases the length of the bolt.

B
Wrapping more copper wire around the bolt increases the density of copper.

C
Wrapping more copper wire around the bolt increases the mass of the battery.

D
Wrapping more copper wire around the bolt increases the strength of her electromagnet.

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.

1) a

2)c

3)a

4)c

5)b

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