What type of property is illustrated by this picture? A chemichal, B physical, C, Conversation, D Element

Ajet plane is speeding down the runway during takeoff. air resistance is not negligible. identify the forces on the jet.

What causes the appearance of lines in a emission spectrum

Which of the following statements best explains why chemistry is testable a) it can measure data by experiments b) it cannot add new evidence c) it cannot be verified d) it is biased