7. A cook had a jar containing a sweet food and a jar containing a sour food. The image above shows
the sweet and sour foods. At room temperature, both foods are liquids. The same amount of energy
was transferred into both substances. Later, one of the foods had changed phase while the other had
not. Which food changed phase, and how did it change?

a saline water is fed to a reverse osmosis unit at flow rate o rotameter connected to reject (retentate) line reads 8 installed in reject and permeate line reads 15.2 milli siemens/cm and 300 micro siemens/com respectively.

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