Answer:
Speed is a "scalar" quantity
(C) is the correct answer
An object could travel at 10 m/s to some point and then return to the origin at 10 m/s for an average speed of 10 m/s, however it's displacement over that time would be zero for a net velocity of zero.
Answer:It isn’t
Explanation:
Air isn't considered a pure substance because there is no one single chemical element of compound that forms air. Air is a mixture of various pure chemical substances, most of which exist in the gaseous state.
23. I think is. B.is suitable to be processed and used again