Exposure to what type of radiant energy is sensed by human skin as warmth? a). infrared b). ultraviolet c). gamma rays d). x-rays

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.

i do not get it   at all

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