Question

Which of the following phenomena cannot be explained through scientific inquiry?

A hydrogen atom is less massive than a cobalt atom.
The sky appears blue during the day.
Time moves only in one direction.
A ball rolling on the ground eventually comes to a stop.

Answer 1

I guess it must be time moving
Hydrogen atoms are smaller because they contain less protons, neutrons and electrons
There is a reason for the sky thing although I can't remember it
And a ball on a table comes to a stop because of friction