CHEMICAL CLOCK & WATER CLOCK

PHYSICS, Class XII, Part - 1, Chapter - 3,current electricity.
SCIENCE, Class X, Chapter - 1,Chemical reaction & equation.

 

This clock keeps accurate time using energy from a battery that you make. Simply add weird liquids such as soda, fruit juice, dilute ketch-up, salt water, etc. to the two containers, insert four metal electrodes, and connect with three wires.