As a raindrop falls from a cloud to the surface of Earth, A. its speed increases due to gravity.
B. its speed increases due to air resistance,
C. it moves at a constant speed,
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OD. it moves at a constant velocity

Can someone me with questions 15 to 17 plz.

The table describes how some substances were formed substance 19 description formed by boiling pure water formed by combining three hydrogen atoms to every nitrogen atom formed by adding 5 g of sugar to 1 l of water formed by compressing carbon under high pressure based on the given descriptions, which substance is most likely a mixture?

When a spring is compressed, the energy changes from kinetic to potential. which best describes what is causing this change?