Question

The mass of a piece of Iron is 400g and Its volume is 51cm³.

Q1: What is the density of the Iron piece?

Q2: State and explain what happened to the density of the iron object when it is heated.

Answer 1

Answer:

Density=mass/volume

when the iron object is heated it's density is decreased

volume got increase

Answer 2

$\red{Answer=}$

1) Density = Mass/volume

Density = 400/51= ${7.843gm/cc}$

2) $\pink{Reason:}$

If a iron rod is heated it will get longer and fatter and its density will decrease. This happens because the mass of the rod remains the same but on increasing temperature its volume increases.The increase in volume with temperature is called as expansion.

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