(A) a Tidal Turbine Has an Efficiency of 40

question 20

Essay

(a) A tidal turbine has an efficiency of 40%. In a tidal stream with a velocity of 7 m/s, what is the diameter of a turbine that is required to produce 1 MWe?
(b) A wind turbine has an efficiency of 40%. In a wind with a velocity of 7 m/s, what is the diameter of a turbine that is required to produce 1 MWe?
(c) From the answers to parts (a) and (b), calculate the relative mass of water to air passing through the rotor per second.

---

Definitions:

Multifinality

A principle in psychology that suggests the same beginnings can lead to multiple outcomes, highlighting how varied end states can arise from the same initial condition.

Social Media

Platforms and technologies that enable users to create, share content, and participate in social networking on the internet.

Systems Theory

A theoretical framework that analyses complex phenomena as systems of interrelated components, emphasizing whole-system behaviors rather than the properties of individual parts.

Theory of Relativity

A fundamental principle formulated by Albert Einstein that describes the laws of physics as the same for all non-accelerating observers and the speed of light within a vacuum as the same no matter the speed at which an observer travels.