Question

answer the following

Answer 1

1. even though the surface of the glass is plane, a slight frictional force will come into play.

2.this is because friction wears away the rough surface of the shoes and makes them slippery

6. no the occurrence of an earthquake cannot be predicted.

7.the uncharted plastic straw will gain charge till both of their charges are equal.

8.iron reacts with oxygen and moisture in the air to produce rust(Fe2O3.H2O)
To prevent this iron is coated with zinc.




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