INTRODUCTION TO PHYSICS
CONCEPT OF PHYSICS
By the end of this topic, the student should be able to;
KET TERMS AND CONCEPTS.
Physics is the study of the relationship between matter and energy. The people who study physics is called physicists
Science is the scientific study of nature. For Example, how cooling effect occur
Technology is the application of science. For Example, cooling effect uses in refrigerator to cool different items.
X-rays, lasers, scanners which are applications of physics are used in diagnosis and treatment of diseases.
Satellite communication, internet, fibre optics are applications of internet which requires strong foundation in physics.
In industrial Applications
In the area of defense, physics has many applications e.g. war planes, laser-guided bombs which have high level accuracy.
In entrainment industry, knowledge of physics has use in mixing various colours to bring out the desirable stage effects
Branches of physics.
Physics as a subject is divided into six broad branches as discussed below.
This branch deals majorly with motions under the influence of forces. Under this branch, we look into details the aspects of linear, circular and oscillatory motions as well as motion of fluids
ii) Geometrical Optics
This branch takes a keen look at the behavior of light in various media.
iii) Electricity and magnetism
This branch looks at the interaction between electric fields and magnetic fields and the applications of such interactions.
This branch looks at how heat as a form of energy is transformed to/from other forms of energy.
v) Atomic Physics
This area of study is targeted at the behavior of particles of the nucleus and the accompanying energy changes.
It deals with the study of the propagation of energy through space.
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
Composition and decomposing of matter involves energy. For Example,
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
Physicist should master mathematics because physics problems may involve calculation
Astronomy is the scientific study of universe. Universe is composed of moon, sun, stars, comets, planets etc. It uses different instruments to study the universe which are made by physicists. For Example,
Periscope and telescope are used to observe distant objects like stars
Material used to build the space like satellite are determined by physicists
Geography is the study of man and his environment. It includes soil, rainfall, mountains etc. it uses application of physics, for Example,
Many instruments like rain gauge, wind vane are developed by physicist
Barometer which is used to measure the atmospheric pressure is made by physicist.
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
2. Medical field
3. Source of energy
All Vessels used in transportation is results of concept of physics. For Example, cars, ships, aeroplane, trains.
All Devices used in communication systems is results of concept of physics. For Example, telephones, modems, television, cables etc
Physics enable people to enjoy a variety of leisure activities as is evident in photography, digital appliances, exercise machines and other sport equipment.
Physicists have been able to come up with tools and process that have resulted in advanced technological equipment and new discoveries.
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
Physics - the study of matter, energy and their interactions - is an international enterprise, which plays a key role in the future progress of humankind. The support of physics education and research in all countries is important because:
In summary, for all these reasons, physics is an essential part of the educational system and of an advanced society. We therefore urge all governments to seek advice from physicists and other scientists on matters of science policy, and to be supportive of the science of Physics. This support can take many forms such as:
TOPICAL QUESTIONS: FORM ONE.
INTRODUCTION TO PHYSICS:
MULTIPLE CHOICE QUESTIONS.
1. For each of the item below, choose the correct answer from among the given alternatives and write its letter beside the item number.
(i) The branch of science which deals with the study of the relationship between matter and energy is:-
(ii) Physicist is a person whose occupation specializes in the science of:-
(iii) Matter is________________
(iv) The ability or capacity of doing work is known as:
(v) The following is the fundamental subjects which other subjects use its application.
2. Complete each the following statement by writing the correct answer in the space provided.
(i) __________ is a scientific study of matter in relation to energy.
(ii) Energy is ability or capacity of doing________________
(iii) _______________ is anything which has got mass and occupies a space.
(iv) There are _______________ states of matter.
(v) A person who study Physics is called_______________
3. Define the following terms.
4. List any three importance of studying Physics.
5. List any five areas where Physics is applied in real life.
6. Mention five subjects which relates with Physics.