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CBSE Class 10 Answered

question
Asked by sweetynam | 18 Feb, 2009, 04:39: PM
Expert Answer

a)Anaerobic bacteria decompose animal dung into biogas.

b)A windmill is a machine that is powered by the energy of the wind. It is designed to convert the energy of the wind into more useful forms using rotating blades or sails.It has wind turbine which 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.

Answered by | 19 Feb, 2009, 02:07: AM
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