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3 godz. temu · Definition and basic operations Various complex numbers depicted in the complex plane. A complex number is an expression of the form a + bi, where a and b are real numbers, and i is an abstract symbol, the so-called imaginary unit, whose meaning will be explained further below.For example, 2 + 3i is a complex number. For a complex number a + bi, the real number a is called its real part, and ...
1 dzień temu · Poland, officially the Republic of Poland, is a country in Central Europe.Poland is divided into sixteen voivodeships and is the fifth most populous member state of the European Union (EU), with over 38 million people, and the seventh largest EU country, covering a combined area of 312,696 km 2 (120,733 sq mi). It extends from the Baltic Sea in the north to the Sudetes and Carpathian Mountains ...
1 dzień temu · Illustration of the general phases of a life cycle assessment, as described by ISO 14040. Life cycle assessment (LCA), also known as life cycle analysis, is a methodology for assessing environmental impacts associated with all the stages of the life cycle of a commercial product, process, or service.For instance, in the case of a manufactured product, environmental impacts are assessed from ...
3 godz. temu · Some climate change effects: wildfire caused by heat and dryness, bleached coral caused by ocean acidification and heating, environmental migration caused by desertification, and coastal flooding caused by storms and sea level rise. Effects of climate change are well documented and growing for Earth's natural environment and human societies. Changes to the climate system include an overall ...
1 dzień temu · Wind power is the use of wind energy to generate useful work. Historically, wind power was used by sails, windmills and windpumps, but today it is mostly used to generate electricity.This article deals only with wind power for electricity generation. Today, wind power is generated almost completely with wind turbines, generally grouped into wind farms and connected to the electrical grid.
1 dzień temu · Educational research. Educational technology (commonly abbreviated as edutech, or edtech) is the combined use of computer hardware, software, and educational theory and practice to facilitate learning. [1] [2] When referred to with its abbreviation, "EdTech", it often refers to the industry of companies that create educational technology.
