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What do all waves carry?
Energy (and can do work).
What affects the energy of a wave?
Amplitude and frequency.
How does energy depend on amplitude?
Proportional to amplitude².
How does energy depend on frequency?
Proportional to frequency².
What does it mean conceptually for average power?
Power increases with: Bigger amplitude, Higher frequency, Faster wave speed.
Units of intensity?
W/m².
Why do waves get weaker with distance?
Energy spreads over a larger area.
Does total energy change as wave spreads?
No (if no energy loss), but intensity decreases.
What makes up wave energy?
Kinetic energy and Potential energy.
Relationship between KE and PE in a wave?
They are equal on average.