Physics
Land is considered a resource because it

Costs little or nothing to use
Requires labor to be useful
Is always available to use
Is used to produce things

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Physics
An electron microscope gives higher magnification than an optical microscope, because :

The electrons have more energy than the light particles
It uses more powerful lenses
The wavelength of electrons is smaller as compared to the wavelength of visible light
The velocity of electron is smaller than that of visible light

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