Tidal Energy
Electricity generation from tidal water movement using underwater turbines or barrages that harness gravitational energy from moon-sun-earth interactions.
Formula
Tidal Power = ½ × ρ × A × v³
Real World
The MeyGen tidal stream project in the Pentland Firth, Scotland, uses underwater turbines in one of the world's strongest tidal channels, generating predictable electricity that can be forecast years in advance unlike wind or solar.
Exam Focus
Stress predictability as tidal energy's key advantage over other renewables — examiners reward students who distinguish between variable and predictable renewable sources.
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