History of Earths Climate
Earth formed ~4.6 billion years ago
Originally very hot
Suns energy output only 70% of present
Liquid water present ~4.3 billion years
History of Earths Climate
Life appeared ~3.8 b
By the year 2025 two thirds of the world population will live under
severe water stress conditions as determined by studies of the
World Meteorological Organization (WMO).
The rapid growth of Agricultural and Industrial sec
RAIN WATER HARVESTING
A NOBLE GOAL &
A COMMON RESPONSIBILITY
Reasons of Shortage of Water
(a) Increase in per capita utilization
(b) Less peculation area
In places where rain fed/ irri
Radioactive substances are present in nature.
They undergo natural radioactive decay in
which unstable isotopes spontaneously give
out fast moving
particles, high energy
radiations or both, at
Due to its unique properties water is of multiple
uses for all living organisms.
Water is absolutely essential for life.
Most of the life processes take place in water in
water contained in the body.
Uptake of nutrients, their distribut
- THEORY & PRACTICE
Definition: Development without destruction.
Sustain means - keep alive or in existence.
World commission on Environment and Development 1987, defined as
meeting the needs of the present w
Environmental Impact Assessment (EIA) is a tool used for
decision making regarding developmental projects and
It may be defined as a formal process used to predict the
WATER SHED MANAGEMENT
Watershed can be defined as a unit of area covers all the
land which contributes runoff to a common point or outlet
and surrounded by a ridge line.
Deterioration of watershed takes place due to faulty and bad
Nature of thermal
pollution & effects
What is Thermal Pollution
Thermal pollution is generally defined as the
discharge of heated water into aquatic biomes.
But thermal pollution also covers releases of colder
Problems and concerns:
Economic development raises the quality and standard of living of the
people of a country.
Developmental projects are planned to bring benefits to the society.
However, in th
Tyco Electronics Corporation
1610 Cobb International Parkway, Unit #4
Kennesaw, GA 30152
1) What is a transformer and how does it work?
A transformer is an electrical apparatus designed to convert a
Explain the principles of the magnetic field
Explain the principles of electromagnetism
Describe the principle of operation for several
types of electromagnetic devices
Discuss the princi
Design of Synchronous
Generator with Round Rotor
Part 1 General Considerations
Synchronous Generator System
Rotor Peripheral Speed
The maximum allowable peripheral speed of the rotor is a central consideration in
machine design. With present-day steel all
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