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Physics 20 Online
OpenStudy (anonymous):

scientif theories are subject to change? true or false

OpenStudy (anonymous):

True. Think of the theory that light travels due to the ether or that acquired characteristics can be inherited (Lamarck) or that the earth or later the sun, were centers of the universe.

OpenStudy (anonymous):

False without theories there would be no social network electronics cars etc

OpenStudy (jfraser):

very true

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