Question

please give your correct answer only, ​

Answer 1

Explanation:

8. to stop the car

to stop the planes using reverse thrust

to light fire using friction..

7. the device which is used to purifies the water is called water purifiers. their uses are to provide clean water, to remove germs, and to add some minerals like chlorine and zinc...

6. the paper with large pores will not resist impurities from the solvent beacause of it larger pores impurities will not stuck in it so filtration will not occurs. however larger papers will not recommended..

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Answer 2

Answer:

4)a.freezing

b.boiling___________________________________________

_____________________

5)Filtration is a better technique than sedimentation and decantation because it can separate very fine insoluble particles as compared to the latter.__________________________________________

_____________________

7)One major purpose of water purification is to provide clean drinking water. ... The purification procedure reduces the concentration of contaminants such as suspended particles, parasites, bacteria, algae, viruses, and fungi._________________________________________

____________________

8)★friction helps us to walk on the ground.

★we can write on a paper due to fiction

★it help us to generating heat when we rup our hand together.

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