My New Vocabulary for Today: Part 89

Hi, I'm trying to make some sentences using the new vocabulary I learnt today. (both ways, learnt and learned are acceptable; however, Modern Standard English usually employs 'learned').
If there are any grammar mistakes and/or weird word choices, please correct them. Thanks.

1) Perception is one of the functions of the brain.

2) This computer utilizes an irrelevant ways.  (utilizes what? Data? your sentence doesn't have an object: The computer utilizes irrelevant data (?)  The computer utilizes data in irrelevant ways (?))

3) I divided my mail into two folders: unsolicited and solicited. 

4) This project entails more feasible ideas.

5) Don't say that in such an imperative voice.

6) My shortcoming is that I use too much jargon.

7) Your appraisal is going to be felt if you fail any strenuous efforts. - doesn't really make sense. 

8) The power grid loses power from time to time.

9) I'm sure that those particles of sand come from a different province.

10) I have found a tremendous way to mitigate those effects.

11) I scuttled from this country when the economy had taken a downturn.

12) You should change oil filters every other time you change the oil.

13) You should change the engine oil either every six months or after 5000km - whichever comes first.