HERE IS THE RESPONSE. I WILL APPRECIATE YOUR RESPONSE IN THE SAME.
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Work, energy, power and machines
Energy is a scalar quantity measured in joules.
Sources of energy
The following are the main natural sources of energy.
The sun is the main source of energy on earth, producing both heat and light.
Wind energy is used in driving windmills for pumping water or generating electricity.
Wood and charcoal, coal, petroleum and natural gases are fuels which when burnt produce energy.
Deep inside the earth’s crust is extremely hot. When underground water is exposed to this immense
heat heat, it turns into steam under very high pressure and gushes out of the earth’s surface with a lot
of energy. May be used to turn turbines in geothermal power stations to produce electricity.
High dams and waterfalls
This water may be used to turn turbines in hydroelectric power stations to produce electricity.
Tides and waves in oceans possess energy which may be converted to useful forms such as electrical
Nuclear (or Atomic) energy
When unstable atoms of a nucleus is split through reactions such as nuclear fission, energy is released.
This energy may be used to heat water to produce steam at high pressure. The steam is then used to
drive turbines in to produce electricity.
Nuclear energy can also be produced by combining two light atomic nuclei by a process known as
Renewable and non – renewable energy resources
Renewable energy is that which is supplied by a process in the environment that can be recycled or reused over and over again. The supplies are inexhaustible. Non-renewable energy is supplied by
processes that are exhaustible in nature. The materials once used up cannot be retrieved.
Table 4.1 shows some renewable and non-renewable resources.
Table 4.1: renewable and noon-renewable energy resources
Firewood, charcoal, biogas
Forms of energy
Below are some of the forms of energy that re encountered in everyday life.
Chemical energy is a form of energy stored in chemical compounds. Chemical energy is found in foods,
oils, charcoal, coal, firewood, biogas and batte...