Table of Contents What are waves? Mechanical and Electromagnetic waves Waves motion Transverse and longitudinal waves Propagation of waves General representation of waves Terms use in describing waves and relationship between them Equations of traveling of waves Wavefronts Progressive and stationary waves Stroboscope Properties of waves Polarization and Polarization by reflection What is wave? A …
Mirror formula and the nature of the image formed by curved mirrors What is a Mirror formula for concave mirror? A mirror formula is a relationship between the object distance or height (u), image distance or height (v) and focal length of the mirror Reflection of light by curved mirror A concave mirror has a …
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Refraction of light CONTENTS Definition of refraction of wave Refraction of through rectangular glass block Experimental determination of refractive index using real and apparent depth method Laws of Refraction waves Refraction through a triangular prism Total internal reflection and Critical angle Application of total internal reflection in nature Application of totally reflecting prisms Refraction through …
Reflection of light : Light is wave and also a visible form of energy which is radiated outward from a source. We are able to see object because of the light they produce reflects back to us or light that fall on them from other sources also reflects back to us We have luminous and …
What are Gas laws ? To study gas behaviors, we should first of all consider three physical properties of gas, which are pressure volume and temperature. It is based on these three properties that the three gas laws were formulated. Note that among the three states of matter gas is most movable because of high kinetic …
What is Nuclear reaction? There are two types of nuclear reaction in radioactive elements – they are nuclear fission and nuclear fusion Nuclear fission This is nuclear reaction which can be defined as a process in which an unstable nucleus split into two parts of comparable mass. Fusion was discovered by Hann and strassman in …
Simple harmonic motion Question and answer 1 what is damped oscillation? Answer: Damped oscillation is one in which the amplitude gradually decrease with time and finally come to stop or zero. Simple harmonic motion Question and answer 2 Is a body moving with constant speed in a circular path undergoing acceleration? Answer: No it not …
Force Vibration and Resonance Let talk about force vibration before we discuss resonance. From observation the amplitude of vibration in simple harmonic motion never really remains constant but becomes smaller and smaller. For instance the amplitude of bob of a simple pendulum decrease slowly until it comes to a stop. This is caused by loss …
what is simple harmonic motion? If a small body or a particle vibrates or moves to and fro along a straight line under the influence of a force so that its acceleration toward a fixed point (or it equilibrium position) is proportional to its distance or displacement from that point, the body is said to …
general physics questions and answer 1-10 The system international unit of pressure is Nm-2 or what? Answer: Pascal Define pressure. Answer: Pressure is defined as the force per unit area State the Pascal’s principle Answer: The Pascal’s principle states that the pressure applied to an enclosed fluid is transmitted undiminished to every …
AC to DC Converter Alternating current (AC) is used for power line transmission and for high power devices like appliances and lights. The characteristics of AC make it ideal for transmission over long lines and for delivering large amounts of power for relatively unregulated uses, such as generating heat and light. Lower power appliances and …
What is radioactivity? This is the spontaneous decay or disintegration of unstable nuclei of atoms of radioactive elements by the emission of alpha (α-) particle, beta (β-) particle and gamma (γ-) radiation with the production of energy. What are radioactive elements? These are the unstable elements that can decay or disintegrate spontaneously to emit alpha …
Physics Formulas for motions For the equation that connect, speed, velocity, acceleration, distance and time, we have four as listed below. V=U+2aS Physics formulas for work done W=Mgh (work done when something fall from up Physics formulas for energy EK=mgh , m=mass, g=gravity h=height Physics formulas for Power Physics formulas for linear expansion of solid …
Kogi PDP: No law bars former Gov. Idris’s sons from contesting elections – Ogunmola Samson Atekojo Usman at Daily Post Nigeria Amidst claims that a former Governor of Kogi State, Alhaji Ibrahim Idris has imposed two of his sons, Mohammed and Abubakar on the Peoples Democratic Party (PDP) ahead of 2019 general election, the state PDP publicity …
Labour fumes over resistance to unionisation of aviation workers Tony at Vanguard News [image: Labour fumes over resistance to unionisation of aviation workers] THE Nigerian Constitution, African Charter and Convention 82 of International Labour Organisation, ILO, guarantee workers in the country the right to freely associate or form association, in this case, union to fight for, defend …
2019: Nothing has changed with APC – Gamawa, PDP deputy national chairman Engineers tackle policymakers over Enugu-Onitsha road, appointment into ministries What is Nigeria’s foreign policy? Nigeria Customs ranks low in World Bank efficiency report Ex-telecom employees fault PTAD on budget for monthly pension Former Dep Gov, Emeka to battle Oduah for Anambra North senatorial …
TheseThree Navy personnel on trial for allegedly theft of Tompolo’s equipment A court martial has been set up to try the suspects. The post Three Navy personnel on trial for allegedly theft of Tompolo’s equipment appeared first on Premium Times Nigeria. Regional ministers, experts meet in Abuja over Lake Chad crises, insurgency An official explains …
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Semi Conductors These are the material with resistivity between conductors and insulators. That is they are neither conductor nor insulator, therefore they are called Semi conductor. Examples, germanium has resistivity of 0.6×103Ω-m and silicon has resistivity of 1.5×103Ω–m Semi conductors are grouping IV, elements, with four electrons in their outmost shell. The valence electrons of …
2019: Why we won’t give Buhari automatic ticket – APC Ahead of the 2019 presidential election, the All Progressives Congress, APC, has declared that there will be no automatic ticket for President Muhammadu Buhari and other presidential aspirants in the party. National Publicity Secretary of the APC, Yekini Nabena said there will be no automatic …
Iran parliament impeaches economy minister Iran’s parliament impeached Economy Minister Masoud Karbasian on Sunday in the latest blow to the embattled government as it struggles to face down a mounting economic crisis. Karbasian lost the vote of confidence, which was carried live on state radio, by 137 votes to 121, with two abstentions. He is …
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Nigeria can’t aim for skyscrapers when we can’t maintain simple toilets – Peter Obi Former Anambra State Governor, Peter Obi, said Nigeria needs men of vision with proven track records to wake from stupor. He spoke yesterday at the 2018 Making Nigeria Great conference organised by the Summit Bible Church at Abuja. Obi, who looked …
Lai Mohammed cracks guests ribs at wedding reception NAN The Minister of Information and Culture, Alhaji Lai Mohammed got guests at a wedding reception, on Saturday in Ilorin roaring with laughter following his jocoserious remarks. The News Agency of Nigeria (NAN) reported that the minister was the Chairman at the reception of the wedding of …
Police apologise to Edwin Clark over raid on Abuja home 2019: Afenifere yet to endorse any candidate – Fasoranti 2019: APC releases timetable; presidential aspirants to pay N45m, governorship N22.5m ‘My survival a miracle’, Singer Djinee says after accident 2019: Adamawa, Borno APC adopt indirect primaries Fani-Kayode speaks on police interrogation Nigerian editors meet in …
Lewandowski nets controversial penalty as Bayern make winning start Robert Lewandowski netted a controversial penalty awarded by VAR at the second attempt as Bayern Munich opened the new Bundesliga season with a 3-1 win over Hoffenheim on Friday. Thomas Mueller put Bayern ahead with a first-half header and Adam Szalai equalised before Lewandowski’s spot-kick and …
Uduaghan’s exit shocks PDP, APC excited Uduaghan’s exit shocks PDP, APC excited] THE dumping of Peoples Democratic Party, PDP, for All Progressives Congress, APC, by former Governor of Delta State, Dr. Emmanuel Uduaghan came as a shocker to the members of powerful PDP family in the state, but for APC, which is awaiting his formal …
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Why I trekked over 800 metres on Sallah Day – President Buhari Why I trekked over 800 metres on Sallah Day – President Buhari] President Muhammadu Buhari has said that his long distance trekking on Sallah day was not about testing his physical fitness but to show respect to thousands of people who wanted to …
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LG Workers Strike: Crack, confusion in Ekiti labour unions Many workers resumed work after an announcement by the NULGE leaders. The post LG Workers Strike: Crack, confusion in Ekiti labour unions – Premium Times Nigeria. IPOB: Amnesty International investigates detention of over 100 female protesters “Amnesty International is investigating the disturbing arrest of 114 peaceful …
2019: APC denies setting date for primaries [image: 2019: APC denies setting date for primaries] All Progressives Congress, APC, has denied releasing dates for its primaries ahead of the 2019 general election. Continue reading 2019: APC denies setting date for primaries at Vanguard News. Tears, as Orits Williki, Okoroji, others pay last respects to reggae …
Headlines News from Daily Post: Nigeria EPL: Why Chelsea rejected £25million offer for Nigerian forward Chelsea threw out a £25million bid from Tottenham Hotspur for Nigerian-born striker, Tammy Abraham, on deadline day, Goal reports. Abraham, who was identified by Mauricio Pochettino as an understudy for Harry Kane, was keen on a switch across London, but Chelsea …
World leaders meet to discuss water crisis The 2018 World Water Week will be held from August 26 to 31. The post World leaders meet to discuss water crisis appeared first on Premium Times. Why Nigeria may not experience accelerated growth – ASUU The ASUU president also speaks on the crisis at LAUTECH. The post …
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Fundamentals of Physics questions and answers 1-10 Why is it that when you match a rug in your room you feel worn but when you match on the floor which is in the same room temperature with the rug you feel cold? Answer: It is because the cement floor is a good conductor of heat, …
What is Projectile motion in physics Projectile is an object thrown into air or launched in space to move freely by itself under the influence of gravity and air resistance. In projectile motion we have time of Flight, time to reach maximum height, Maximum height and Range, all these are the parameters we take …
What is Quasar Quasar also known as QSO Quasi-Stellar object is an extremely luminous active galactic nucleus Quasars are the furthest object from galaxy that can be seen Quasars are the brightest object in the universe Quasars are believed to be a supermassive black hole rounded by an accretion disk. Quasar is about two billion …
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These are the the black hole facts you may not know 1. Black hole is a place in space where gravity pull so much that it can trap light 2. In black hole matter are being squeezed in tiny space hence the strong gravity 3. Nobody can see black hole because no light can get …
20 Small scale business you can do to make cool money Small Scale business : below we have lists of small scale business you can do. If you are a graduate that have been looking for job, but job is not forthcoming or whatever you are and you are looking for a …
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How to promote affiliate marketing products Joining affiliate marketing program alone does not assure you making money online, it is how and where you promote the affiliate marketing that matters. That is why you may join an affiliate marketing or program but in long run you may make little or nothing because you are not …
Electromagnetic Wave These are the types of waves that do not need material medium for their propagation. They are produced by electromagnetic vibration. All the electromagnetic wave have the velocity of about 3 x 108m/s , but they defers in their wave length and in their frequency too. Therefore electromagnetic waves can be distinguished by …
Online business you can do Online business is key now, the truth is that in less than 5 years, if you’re still operating offline business you may not make any sales. Online business is taking over the normal offline business, and that is the trend. If your business is only operating offline, it time you …
Physics question and answer on wave 1 What is wave? Answer: Wave is a disturbance which travels through a medium, transferring energy from one point to another, without permanently displacing the medium. Read also : Electromagnetic wave examples and uses Physics question and answer on wave 2 What is the difference between Mechanical wave and …
How to make money online Here you are going to learn, where and how to make money online. There are many places where you can make money online. I am not here to tell you story, therefore I will go direct to tell you how to make money online. Read also: how to promote affiliate …
What is force? Force can be defined as agent that causes a body to change its state of rest or make it change its state and direction of its uniform motion when it come in contact with the body. It can also be describe as external agent when applied to a body changes its state …
What is friction? Friction can be defined as a force which act at the surface of separation of two bodies in contact, and tend to oppose the motion of one over the other. Or The force resisting the relative motion of solid surface, fluid layers or object sliding against each other Frictional Force The frictional …
Physics question and answer on motion 1 A car moves from rest with an acceleration of 0.2m/s2. Find the velocity when it has moved a distance of 50m. Answer V2 + u2 = 2aS Where v = ?, u = 0 (because the car started from rest) a = 0.2m/s2, and = 50m V2 + …
Thermal expansion: solid or liquid expand when heat is applied to them. The expansion of any material both liquid and solid depend on the nature of the substance. Thermal expansion question and answer 1 Define the followings (a), Linear expansivity, (b). Cubic or expansivity a nd (c). Superficial expansivity Answer (a) Linear expansity os solid …
specific heat capacity questions and answers 1 Define specific heat capacity and derive the mathematical formula. Answer The specific heat capacity is defined as the quantity of heat required to raise the temperature of a unit mass (1K) of a body through a degree rise in temperature(1k). The formula of the specific heat capacity. Note …
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Physics: question and answer on elasticity and Hooke’s law 1 Elastic wire extended by 1.0cm when a load of 20g hangs from it. What additional load will be required to cause further extension of 2.0cm? Answer 1.0cm = 0.01m. 2.0cm = 0.02m The force exerted by 20g Convert the 20g to kg and multiple it …
Simple machine question and answer 1 . A machine has a velocity ratio 5 and 80% efficient. What effort should be needed to lift a load of 200N with the aid of the machine? Answer V.R = 5, Efficiency = 80% Effort needed = 50N Read also question and answer on momentum Simple machine question …
questions on momentum and gravity 1 t0 5 Momentum and gravity: Give the direction and magnitude of the net force acting on the followings (1) drop of rain falling down with a constant speed (2) A cork of mass 10g floating on water (3)) A kite held stationary on the sky (4) A can moving …
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Vernier caliper is an instrument use in measurement. We use vernier caliper to measure small length such as diameter of rod , internal diameter of a tube the depth of a cavity or the thickness of a plate, that which cannot be measured accurately by meter rule. parts of the Vernier caliper. A Vernier caliper …
Newtons Law of cooling Newtons law of cooling state that for small difference in temperature between a body and it surroundings, the rate of gain or loss of heat by the body is proportional to the difference in temperature between the body and the surroundings. The Newtons law of cooling only holds in small range …
X-ray production The x-ray which is an example of electromagnetic, is produced when a rapid moving electron that have been accelerated through a potential difference of 103v to 106v strike a metal target. The electron are produced by thermionic emission from the heated cathode and accelerated toward the anode (target) by large potential difference between …
Law of Conservation of Momentum Before we talk about conservation of momentum, let us first of all define momentum. Momentum is the products of mass and velocity. For example if a body of mass, M, is moving with velocity v, then the momentum of the body is = m x v. From the Newton’s second …
