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www.reference.com/article/make-potato-clock-8f25b01c03e6c6de

To make a potato clock, connect two potatoes to a low-voltage LED digital clock with copper wire, galvanized nails and alligator clips. This easy chemistry project demonstrates the concept of electrochemical cells, in which chemical energy is converted to electrical ene...

www.reference.com/article/water-clocks-work-94c825812fff0b89

A water clock uses flowing water to measure time according to the National Watch and Clock Museum. Water clocks are classified as either "outflow" or "inflow" water clocks based on the way liquid moves in relationship to the primary vessel.

www.reference.com/article/clock-system-work-c6f46d19b9541882

Analog and digital clocks work by using a power source to create regular vibrations. The vibrations are converted into electrical energy and then mechanical energy, which drives the gears and hands of the clock.

www.reference.com/article/atomic-clocks-work-6d7ca95cf031dee

Atomic clocks work by exposing an atomic element to radio waves and then measuring the vibration between energy states of the atom's electrons. There are three main types of atomic clocks: cesium, rubidium and hydrogen. A second is defined as 9,192,631,770 cesium vibrat...

www.reference.com/article/water-powered-clock-work-1074579e9808c59c

Water-powered clocks work by gradually dissolving a small fuel cell located inside the water tank of the clock. This cell provides enough energy to power the clock, and the water acts as a conductor to transmit the energy to the clock's connectors. Despite the belief th...

www.reference.com/article/clocks-change-b8b6a58ae514e2ee

The clocks change due to Daylight Saving Time, which starts on the second Sunday in March and ends on the first Sunday in November, as of 2014. People in participating states and territories change their clocks at 2 a.m. on these days.

www.reference.com/article/potato-battery-work-514013e6e8d9433e

Potato batteries use the acids in the potato to start a reaction with two electrodes made of different metals that cause electrons to flow from one to the other through the potato, producing power. The potato acts as a salt bridge, connecting the anode, or negative elec...