Why is space weather a bigger concern now than i was in the past

Because we are now learning the true and real dangerous effects it could have on us and our planet.

We have been hit with a solar flare once before and there is a chance we may be hit by another one that may penetrate our magnetic field. Although it is a very low chance, it's still a possibility

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3