Introduction to Physics Concept of Physics
Defn: Physics is the study of the relationship
between matter and energy. The people
who study physics is called physicists
Science
Defn: science is the scientific study of
nature. For Example, how cooling effect
occurs
Technology
Defn: technology is the application of
science. For Example, cooling effect uses
in refrigerator to cool different items
Relationship between Physics and Other
Subject
Physics is the fundamental subject which
other subject uses application of physics;
the following is the relation with other
subjects
i. Chemistry
Composition and decomposing of
matter involves energy. For Example,
i. Cooking stoves, fuel burn to leased
heat energy
ii. Insect killers and Perfumes packed in
container by compressed which
comes out with high pressure
iii.Fertilizer when they syntheses the
heat energy should involved
iv.When tea and other food cooked
the heat energy should involved
ii. Biology
Since biology is the scientific subject,
which involves living and non-living
things, which may be micro and macro
organism, it uses application of physics.
For Example,
i. Microscope which made by
physicist is used to observe micro
organism
ii. Syringe is based on pressure
iii. Mathematics
Physicist should master mathematics
because physics problems may involve
calculation
iv. Astronomy
Defn: astronomy is the scientific study of
universe. Universe composed by moon, sun, stars, comets, planets etc. it uses
different instruments to study theuniverse which are made by physicists.
For Example,
i. Periscope and telescope are used
to observe distant objects like stars
etc
ii. Material used to build the space like
satellite are determined by physicists
v. Geography
Defn: geography is the study of man
and his environment. It includes soil,
rainfall, mountains etc. it uses
application of physics, for Example,
i. Many instruments like rain gauge,
wind vane developed by physicist
ii. Barometer which used to measure
the atmospheric pressure made by
physicist
iii.Formation of soil and rocks are
explained by physics
Applications of Physics in Real Life
Physics influence our lives as follows
aspects
1. At home
They include
i. All tools and machinery: such as
Crowbars, Hammers, door handles,
cutlery, hinges, car jack, pulleys, tillage
implements etc made by knowledge of
physics
ii. Electrical appliances: such as cooker,
iron, heater, electric lamps, washing
machine etc made by knowledge of
physics
2. Medical field
They include;
i. Machines such laser, x-ray, incubators,
ultrasound and infrared machines
ii. The knowledge used in handling and
even actual use of these machines are
based on the knowledge and skills
acquired in Physics.
3. Source of energy
They include;
i. Batteries and generators provide
electrical energy
ii. bulbs they provide light energy
iii.speaker gives us sound energy
4. Transport
All Vessels used in transportation is results of
concept of physics. For Example, cars,
ships, aeroplane, trains etc
5. Communication
All Devices used in communication systems
is results of concept of physics. For
Example, telephones, modems, television,
cables etc
6. Entertainment
Physics enable people to enjoy a variety of
leisure activities as is evident in
photography, digital appliances, exercise
machines and other sport equipment.
7. Industry
Physicists have been able to come up with
tools and process that have resulted in
advanced technological equipment and
new discoveries.
8. in schools
The instruments and apparatus used in
school laboratories are made through the
application of the knowledge and skill
acquired in a Physics class.
Importance of Learning Physics
i. The study of physics enables us to
answer many question concerning
physical properties of matter
ii. Enable different people to acquire skills
that required in different profession. For
Example, , engineering, teaching and
architecture
iii.Enable us to designing and
manufacture different items. For
Example, , dry cell, simple machines,
mobile phones etc
iv.Enable us to enjoy since we study
practically
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