Determine the density in si unit of a solid of mass 40g with dimension 30cm by 4cm by 3cm

Density = 0.111 g/cm^3

Explanation:

Given that

Make m = 40g

The given dimension are 30cm by 4cm by 3cm

Volume V = 30 × 4 × 3 = 360 cm^3

Density is the ratio of mass to volume.

That is,

Density = mass/volume

Substitute mass and volume into the formula

Density = 40/360

Density = 0.1111 g/cm^3

0.11 m/s and 0.28 m/s should be correct

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.