91影视

Density of object =蟻
All three dimension increased by a factor of 2 without changing the material of which the object is made.

The density of an object is defined as

density =Mass/Volume

If material is not changed so as volume increases, mass also increases.

So the density will not change

Density of object =蟻
All three dimension increased by a factor of 2 .

Mass is not changing.

The density of an object is defined as

density =Mass/Volume

After changing the dimension by 2. The volume will increase by a factor of 8

Assume initial volume = V and Mass = M

then

蟻 = M/V .....................................(1)

Once dimension is increased the volume will become 8V

so the density will be

蟻'=M/(8V) .....................................(2)

Substitute M/V =蟻 in equation(2), we get,

we get

蟻'=蟻 /8

So the density will decrease by a factor of 8