Current location - Plastic Surgery and Aesthetics Network - Wedding planning company - The crown weighs 49 Newton in the air and 46.06 Newton in the water. Is this crown made of pure gold?
The crown weighs 49 Newton in the air and 46.06 Newton in the water. Is this crown made of pure gold?
Buoyancy of crown block in water f = 49-46.6 = 2.94 n.

F=ρgV row = 2.94

Line V = 0.003 cubic meter

Description of the inscription on the crown V=V line = 0.0003 cubic meter.

The mass of crown M=49/9.8=5 kg.

Crown density = m/v = 5/0.003 =16.67x10.3kg/m3.

The density of gold is19.3x10.3kg/m3.

So it's not made of pure gold.