Warm ice may fracture differently than cold ice

Researchers at Aalto University have found strong evidence that warm ice—that is, ice very close in temperature to zero degrees Celsius—may fracture differently as compared to the kinds of ice typically studied in laboratories ...

Power failure: How a winter storm pushed Texas into crisis

Two days before the storm began, Houston's chief elected official warned her constituents to prepare as they would for a major hurricane. Many took heed: Texans who could stocked up on food and water, while nonprofits and ...

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Wind turbine

A wind turbine is a rotating machine which converts the kinetic energy in wind into mechanical energy. If the mechanical energy is used directly by machinery, such as a pump or grinding stones, the machine is usually called a windmill. If the mechanical energy is then converted to electricity, the machine is called a wind generator, wind power unit (WPU), or wind energy converter (WEC).

This article discusses electric power generation machinery. The windmill article discusses machines used for grain-grinding, water pumping, etc. The article on wind power describes turbine placement, economics and public concerns. The wind energy section of that article describes the distribution of wind energy over time, and how that affects wind-turbine design.

This text uses material from Wikipedia, licensed under CC BY-SA