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yes,because we supply power through battery ,battery is the external source.
A compound microscope uses light energy because they have a light source at the bottom
What are some precautions and source of error in the principle of moments
solar energy
Actually the simple pendulum isn't used much any more. But in earlier times the periodicity of the pendulum was used to drive the gears of mechanical clock; like the old grandfather clock that stood in the home of the rich back in the 1800s. Because the period of a pendulum was fairly stable and constant, it made an excellent source of energy for clockworks. But now clocks are driven by much more precise means, like crystals and atomic disintegration. And this is true in general; pendulums have been replaced by more precise means of providing periodic energy.
The single greatest source of CO2 emissions is coal-fired electricity generation.
The greatest source varies on age location etc. but mine is from a drinking fountain.
The sun.
Gravity doesnt have a source.
Primary source
When you are not an expert in the field being studied in the experiment
The Church's greatest sacrament, the source and summit of her worship, is the Eucharist.
yes,because we supply power through battery ,battery is the external source.
Oceans are the principal source of water.
by creating a current flowing circuit
Someone who conducted the experiment.
The Spoony Experiment - 2008 Highlander The Source Review 3-20 was released on: USA: 6 December 2010