Directions: Make a scientific investigation on a specific problem in your area or at home, write it on your science notebook. For example, you turn the light switch ON and the bulb does not light inside your room.​

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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.

i only know number one that’s a galaxy