An electric current is passed through water and bubbles start forming. what is a logical conclusion for the bubbles?

a. water is evaporating
b. the water has impurities in it
c. a physical change has occured
d. hydrogen and oxygen are being formed
(will upvote)

Asubmarine has a "crush depth" (that is, the depth at which water pressure will crush the submarine) of 250 m. what is the approximate pressure (water plus atmospheric) at this depth? (recall that the density of seawater is 1025 kg/m3, g = 9.81 m/s2, and 1 kg/(ms2) = 1 pa = 9.8692 10-6 atm.) a. 34.8 atm b. 24.8 atm c. 25.8 atm d. 7.8 atm

Examples of states of consciousness include a. daydreaming b. dreaming during sleep c. hypnosis d. all of the above

With physics question #5? for any !