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1.what causes the wear and tear of your bicycles tires?
a.conduction
b.combustion
c.friction
d.convection

2.Why is it necessary to apply oil on moving parts?
a. to increase friction
b.to reduce friction
c.to make oxidation rapid
d.to make oxidation slow​


Sagot :

Answer:

no.1 c

no 2b

Explanation:

becuse we need to apply some oil on moving parts becuse we need to

Answer:

1. c

2.b.

Explanation:

that's what I answered so I think it is