Resonance
A Phenomenon In Which A System Oscillates With Maximum Amplitude When Driven At Its Natural Frequency.

Diode
A Semiconductor Device That Allows Current To Flow In Only One Direction.

Doppler Effect
A Change In Observed Frequency Due To Relative Motion Between A Source And An Observer.

Transistor
A Semiconductor Device Used To Amplify Or Switch Current In Circuits.

Sound Wave
A Longitudinal Wave That Travels Through A Medium Such As Air Or Water.

Superconductor
A Material That Exhibits Zero Resistance Below A Critical Temperature.

Centripetal Force
A Force Directed Toward The Center Of A Circular Path, Required For Circular Motion.

Centrifugal Force
An Apparent Outward Force Felt In A Rotating Noninertial Frame.

Simple Harmonic Motion
A Type Of Periodic Motion Described By A Restoring Force Proportional To Displacement.

Oscillation
A Repetitive Back And Forth Motion Around An Equilibrium Position, Seen In Simple Harmonic Motion.