To reduce friction between two surfaces, you have to
make the surfaces smoother.
The best way to do that is to introduce a fluid between them,
like grease, oil, or air.
C, velocity I believe this is the answer to your question
Answer:
ответ семь
Explanation:
Добавить eght то девять и да
B boiling point because you used heat and it turned to vapor so it was boiled