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What is biomass ?
Biomass is a modern name for the ancient technology of burning plant or animal material for energy production, or in various industrial processes as raw substance for a range of products.
Disadvantages:
One of the disadvantages of biomass energy is the amount of space that it requires. Another disadvantage is that biomass energy is not entirely clean. ... Some greenhouse gases are still produced; although the levels of these gases are far less than those produced by fossil fuels.
Write advantages of wind energy .
Advantages of Wind Power
Wind power is cost-effective. ...
Wind creates jobs. ...
Wind enables U.S. industry growth and U.S. competitiveness. ...
It's a clean fuel source. ...
Wind is a domestic source of energy. ...
It's sustainable. ...
Wind turbines can be built on existing farms or ranches.
Draw a ray diagram for concave mirror when the object is at '2f' distance from mirror :
The diagram is the upper one dear
Write laws of refraction .
Laws of refraction state that:
The incident ray, reflected ray and the normal, to the interface of any two given mediums; all lie in the same plane.
The ratio of the sine of the angle of incidence and sine of the angle of refraction is constant.
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