Newton’s laws of motion

Newton’s laws of motion Newton’s laws of motion: Before we discuss Newton’s laws of motion, note that forces are the only thing that cause the motion of a body. Forces: it can be defined as agent that can change or tend to change the state of rest or uniform motion of a body in a …

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Electric field

what is electric Field

Electric Field Electric field cannot be discussed without first all talked about electric force. Electric force: According to coulomb’s law, which state that the force of attraction between two charges is directly proportional to that products of the two charges and inversely proportion to the square of distance separating them and also act along the …

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What is Photo electric effect in physics?

Photo Electric effect What photo electric effect?. It can be defined as the emission of electron from metal surface when photon or electromagnetic radiation fall on it shows on it. For some surface like sodium, the wavelength photons have to be short (ultra-violent  or x-ray). To ensure emission. While for other such as cesium electrons …

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The physics branches

 physics branches  are 1.OPTICS: this is the  physics  branches that is concern with the study of light. Under optics physics we talk about electromagnetic radiation (EMR) like ultraviolet light and son. Optics has three branches, they are: Geometrics optics– which deal with the study of light as rays Physical Optics-which is the study of light …

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QUESTIONS on Heisenberg uncertainty principle

QUESTIONS on Heisenberg uncertainty principle 1 Determine the Heisenberg uncertainty in the Energy of photon which is radiated in time interval of 10-5s Momentum of 0.2kg football moving with a speed of 20ms-1 and restricted to a region of 25cm Determine the fractional  uncertainty in momentum too. Solution (1) using   (2) using   (3) Using   …

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The Heisenberg uncertainty principle

The Heisenberg uncertainty principle Heisenberg uncertainty principle states that neither the position nor momentum of a particle can be determine with great precision simultaneously That means that is not actually possible to measure exact position and velocity of every particle in the universe at a certain time. If measurement of a co-ordinator of x, has …

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quantization of atom in physics

quantization of atom quantization of atom: According to Rutherford in 1910, atom which is positively charged at the nucleus and negatively charged at the obits would collapse in about 10-10s due attractive force between the nucleus and electrons, but in 1913 Niels Bohr  applied quantum theory to the problem and made a suggestion that electrons …

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Satellite definition

How to mount Satellite in orbit What is satellite?  These are body which move around the moon or planet. Some of them are natural while others are artificial.  To put satellites in orbit at certain height above, it must enter the orbit with correct speed where the centripetal force needed to keep it in orbit …

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specific heat capacity definition

Specific heat capacity The specific heat capacity of a substance is defined as the quantity of heat required to raise the temperature of a unit mass of substance, through the a degree rise in temperature.( 1oC of 1k) . The quantity of heat received by the substance is directly proportional to the mass, change in …

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gravitational force definition

The gravitational force Before we go in gravitational force as it was defined by Newton law, let first all say something about gravitational field .The gravitational field can simple be described as field force. This force attracts all objects near to the Earth’s surface. That is the Earth exerts attractive force on every object near …

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surface tension definition

Surface tension and it co-efficient The surface tension is  being defined as a force that act parallel to the surface of a liquid. That is why a surface of liquid behaves as if it is covered with elastic skin, so the surfaces appear to be under tension which is called surface Tension. The surface tension …

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Elastic property of materials

Elasticity of Properties of Solids A body is said to be elastic if it retains its original shape after undergoing stretch or compression. For wires or springs, it observed that if a gradual stretch force is applied, the extension e, produced at anytime is directly proportional to the force or load applied. But if you …

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Classification of Machines in physics

What is Machine? Machines are devices by which work can be done easily. Examples of machines are , hammers, scissors , wheel barrow , pulley, Crowbar or anything at all that can help you do your work at ease. Terminology of simple machine Mechanical advantage: it is defined as the ratio of load to the …

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Electric current basics

 Electric Current Current electricity or electric current consist of the movement of charges from one region of conductor to another. Therefore electric current is a movement of electron around the circuit.   Terms in  electric Electric current Resistance Potential difference (p.d) Cells Electric Circuit Resistivity Conductivity Resistor Insulator Ohm’s law Electric current : it defined …

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magnet and magnetism in physics

Magnet and Magnetism Magnet : it is substance that attract magnetic material.                                                  Magnetic material: it any substance that can be attracted by magnet. Examples are iron nickel, steel cobalt and some …

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electric charge and matter

The electric charge and the structure of matter The static electricity is defined as electric charge at rest. We can only describe the properties of this charges and their behavior. The interactions between electric charge at rest can be observed by considering a plastic rod and a piece of fur. If the rods are charged …

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Thermo-flask keeps warm water warm and cold water cold.

Why thermo-flask keeps warm water warm and cold water cold. The thermoflask is built by considering heat transfer and how substance gain and loose heat, which is by only Conduction, Convention and Radiation. Conduction: It is process by which heat energy is gain or loses by the passage of heat from one molecule or particle …

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Heat transfer by Conduction, Convention and Radiation

 heat energy transfer Heat as one of forms of energy can be transferred from one point to another, through three ways. They are by conduction, convention and Radiation. Heat transfer by conduction: this is a process by which heat is passed along a metal object from one point to another. In this process heat is …

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The effect heat

The effect of heat on matter:Linear, cubic, and superficial expansion

   The effect of heat energy on matter Thermal expansion of solid: Solid expands when heated and contract when cooled. The rate of expansion of solid depends on the type of material the solid is made of. For example the rate of expansion of brass is difference from that of iron etc Effect of expansion Rail way …

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energy

The physics definition of heat energy

Heat energy as a form of energy Heat energy is a form of energy that makes us feel hot. Heat energy can also be defined as a form of energy which flows due to temperature difference. It is produced by sun, friction or fire. Heat can also be produced during chemical reactions Use of heat …

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power

what is power defined as in physics

What is power?  In physics power is defined as rate with which work is done. Power can be calculate in watts or in horse power if you are dealing with electrical power. power have difference equation use in calculation of it , depend on the parameters available just like equations of motion  and what you are …

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equations of motion

Equations of motion in physics

Parameters and equations of motion The parameters of motion in straight lines are: displacement, speed, or velocity, acceleration and time ALL the parameter is vector quantity except speed and time Displacement: it is the distance travel in specific direction Speed: Is the rate of change of distance with time. That is where v= speed S= …

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motion

What is motion in physics?

The motion in physics   Moving away from introduction of physics, energy, work done, units and dimension and measurement, today we are going to study motion.  Motion: it the movement of a body from one place to another. The study of motion without involving the force that causes it is called Kinematic, while the study …

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work done

what is work done in physics defined ?

work done in physics Outside physics, work has difference meaning, include even mental activities like reading, working in offices and many more. But in physics, work means only one thing. Work is said to be done when a force moves a body to a certain distance in direction of force. Work done is equal to …

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energy

what is conversion and conservation of energy

what is conversion and conservation of energy In physics energy can be defined as the ability or capacity to do work. The unit of work and energy are the same which is Joule. Forms of energy (a). Kinetic energy:- this  is the energy in moving body. (b) Chemical energy: – energy in our food, motor …

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Fundamental and Derived quantities,units and dimensions

Fundamental and Derived quantities,units and dimensions

Fundamental and Derived quantities,units and dimensions Physical quantities have no meaning, unless is measured quantified and give a unit. Therefore we need number or quantity and unit of measurement to specify physical quantities. There two type of physical quantities, Fundamental and derived quantities. Among the fundamental quantities we have three most important, there LENGTH, MASS, …

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measurement

How to take Measurement of length, mass and volume

Measurement of length A length can something  be measured by using meter rule, caliper, venire caliper, and micro screw gauge. The instrument for measurement of length depends on how large or small the length is. If the length is very long like foot ball field, you use tape; a shorter distance like your reading table …

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The lists of famous physicists around the world today

The lists of Physicist, their country, their discovering and the of year of discovering Introduction to the study of physics NAME                                                                                                 YEAR COUNTRY                                INVENTION William Gilbert   1544-1603   ENGLISH   hypothesized that the Earth is a Giant magnet Galileo Galilei 1564-1642 Italian performed fundamental observations, experiments, and mathematical analyses in astronomy and …

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Introduction to the study of physics

what is physics

what is of physics Physics is the study of matter its mass and energy.  Physics Can also be simply defined and the study of matter and its physical properties. The importance of Physics Physics is very important as every product of technology was built with physics laws and principle. There nothing on built by scientists …

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