An ecosystem is a community of living organisms in conjunction with the non-living components of their environment (things like air, wider and mineral soil), interacting as a system. Ecosystem is a natural unit which consists of biotic communities and their abiotic environment. It is also Basic funcRead more
An ecosystem is a community of living organisms in conjunction with the non-living components of their environment (things like air, wider and mineral soil), interacting as a system. Ecosystem is a natural unit which consists of biotic communities and their abiotic environment. It is also Basic functional unit in ecology. Energy, water, nitrogen and soil minerals are other essential abiotic components of an ecosystem. Ecosystem are controlled both by external and internal factors. External factors such as climate, parent material that forms the soil, typography, etc. and internal factors include disturbance, succession and the types of species present.
Characteristics of Ecosystem:
i) Biotic component: producer (green plants), consumers (animals), decomposers (microorganisms)
ii) Abiotic component: Air, water, soil
iii) Energy flow: Sun is the main source of energy
iv) Matter
v) Interrelationship
vi) Biological integration
vii) Flexibility
viii) Ecological regulation
ix) Smallest unit of biosphere
x) An open system with a continuous, but variable influx and loss of materials and energy.
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The perpetual motion was originally conceived as a purely mechanical contrivance when once set in motion would continue to run forever. Such a machine would be merely a curiosity of no practical value and we know that the presence of friction makes it impossible. One would be of immense value is a mRead more
The perpetual motion was originally conceived as a purely mechanical contrivance when once set in motion would continue to run forever. Such a machine would be merely a curiosity of no practical value and we know that the presence of friction makes it impossible. One would be of immense value is a machine producing a continuous supply of work without absorbing energy from the surroundings, such as a machine is called a perpetual motion machine of the first kind.
It is always possible to devise a machine to deliver a limited quantity of work without requiring a source of energy in the surroundings. For example, a gas compressed behind a piston will expand and do work at the expense of the internal work of the gas. Such a device cannot produce work continuously, however, for this to be achieved the machine must be capable of undergoing a succession of cyclic processes. An equation ΣδQ=ΣδW states that if a net amount of heat is not supplied by the surroundings during a cycle, no net amount of work can be delivered by the system. Hence, the first law of thermodynamics implies that a perpetual motion machine of the first kind is impossible.
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