General Science - Single MCQs (Page 20)

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Q191. Highest percentage of air consists of?...Q192. The shape of the airplane is like a?...Q193. Rolling friction is smaller than?...Q194. Lubricants ________?...Q195. Friction is a /an_______?...Q196. On what force of friction depends?...Q197. Fluid are____?...Q198. What kind of substances are known as lubricants?...Q199. Friction is a __________?...Q200. Which one of these characteristics does a smooth surface has?...