CODE BREAKING CHALLENGE: are u genius enough?

Question

if u r smart ,then crack this code & u'll get 10 points:

3,6,18,15,13,1,20,15,7,18,1,16,8,25 =?

5-17-21-9-12-9-2-18-9-21-14 = ?

( _ _ ) (._ ) ( _ _. ) ( _. ) ( . ) ( _ ) ( .. ) ( ... ) ( _ _ ) = ?

clue 1 : the topic is about science.

Answer 1

Chromatography (second number should be 8 not 6!)

Equilibrium

hmm.. have to think about the last one.

Answer 2

The third one is MAGNETISM in Morse code