The answer to your question is 5:7
Attenuation is the correct answer.
True
A scientific law only states that an event occurs.
Hope this helps!
Celina should perform the following method to get pure water:
Boil the water in a pan, as the water boils it changes into gas (water vapours) these vapours should be cooled down through the process of condensation which changes gas into liquid form, Through this process germs would be killed due to high temperature and the salt will remain in the pan as salt has higher boiling point than water,