Kiedy w obwodzie płynie prąd? Czym różni się obraz mikroskopowy:
a) przewodnika nie podłączonego do napięcia od przewodnika podłączonego do napięcia
b) przewodnika z prądem 2A i przewodnika z prądem 4A

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

How are positive ions different from neutral atoms

How does the motion of an airplane compare to the motion of a rocket ?