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☆☆☆☆☆SILICON or common sand with doping of the right ratio to make a transistor.
three layers of semiconductor material
by creating two circuit loops
transistor
magnetic feilds are produced only when current is flowing
amplitude
a wave with long wavelength and high frequency.
to decide true or false
sound waves require a medium to transfer energy
FOR A+ USERS THE ANSWER IS Sound waves travel in all directions
sound waves require a medium to transfer energy
-- They are longitudinal waves and material medium is required for their propagation.
The device is called a "variac' and it is a type of transformer. It has a variable voltage ouput.
most of the EM spectrum is visible light.
uv radiation destroys vitamin D
The heat in an endothermic reaction is included as a reactant on the left side of the equation, and has a positive value.
