MACHINES AND ENERGY
miércoles, 29 de enero de 2014
MACHINES
What is a machine?
A machine is an object made up of one or more parts. It helps us to do a task saving time and effort.
LEARN AND ENJOY
http://www.edheads.org/activities/simple-machines/index.shtml http://www.edheads.org/activities/odd_machine/index.shtml
SIMPLE AND COMPOUND MACHINES
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