Hallo...✋
Help me out!

1. Rollers help in making the work easy because ____________ friction is less than the_________ friction.
2.Friction opposes the _________ between the surfaces in contact with each other.
3. Friction depends on the _________of the surfaces.
4. Tincture iodine is used as an ________.
5. _________ is used to making matchsticks.
6. To harden the metal,gold is mixed with _________