What is the classification of clouds based on?

High clouds (CH)

Base usually 20,000 ft or above, over British Isles

Medium clouds (CM)

Base usually between 6,500 and 20,000 ft over British Isles.

Low clouds (CL)

Base usually below 6,500 ft over British Isles.

2b2t

explanation:

2b2t

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