Question

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Answer 1

Answer:

QUE 17

a. rolling friction

b. static friction

QUE 18

magnetic force

QUE 19

a. push

b. pull

QUE 20

1.Compressed natural gas

2.Liquefied petroleum gas

QUE 21

bitumen

Explanation:

Hope its help you

Answer 2

Answer:

Q 17

a rolling friction

b static friction

Q 18 magnetic force

Magnetic force, attraction or repulsion that arises between electrically charged particles because of their motion. It is the basic force responsible for such effects as the action of electric motors and the attraction of magnets for iron.

Q 19 a Push

b pull

Q 20 a compressed natural gas

b liquefied petroleum gas

Q21 bitumen

a black viscous mixture of hydrocarbons obtained naturally or as a residue from petroleum distillation. It is used for road surfacing and roofing.