Which of the following describes how a heat pump works? a. a heat pump compresses gas to warm and and decompresses to cool air. b. a heat pump compresses gas to warm and cool air. c. a heat pump decompresses to warm air and compresses to cool air. d. a heat pump decompresses to warm and cool air.

i think it is true since you can test the answer and can use observations to complete it.

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