Category: General
Explain why a person standing by the roadside may be pulled towards the road when a very fast-moving bus passes by.
Air close to fast moving bus has high velocity and hence lower pressure compared to the still air around a stationary person The difference in ... Read More
Derive the expression for Bernoulli’s equation
. Derivation of Bernoulli’s expression Considering a moving incompressible liquid, if the viscosity is negligibly small, there are no frictional forces to overcome. In ... Read More
Describe an experiment to determine the relative density of a liquid.
By means of a thread, determine the weight of solid in air, liquid, and water = W1, W2, and W3 respectively. 0778 633 682 Read More
State Archimedes Principle
When a body is partially or fully immersed in a fluid, it experiences an up thrust which is equal to the weight of a fluid ... Read More
Relative density- meaning in physics
Relative density is the ratio of the mass of any volume of a substance to the mass of an equal volume of water 0778 633 ... Read More
Define pressure in physics
Pressure is force per unit area 0778 633 682 Read More
Derive the condition for a car to move round a banked circular track without slipping.
Consider car negotiating a bend inclined at an angle θ to the horizontal. It is assumed that there is no tendency to slip at the ... Read More
Define Centripetal acceleration.
This is the rate of change of velocity for a body moving in a circular path and it is directed towards the center of that ... Read More
Why does glass break easily?
Glass is brittle due to small cracks on its surface. Any concentration of tensile stress/force on any of these cracks makes the glass break. Dr. ... Read More
Sketch the stress-strain curve for glass and explain its shape.
Glass: has he smallest elastic region and no plastic deformation regions. Read More
Derive an expression for the energy stored in a stretched wire within the elastic limit.
Dr. Bbosa Science 256 778 633 682 Read More
Define strain as applied to materials
Strain is the ratio of extension over original length Dr. Bbosa Science 256 778 633 682 Read More
Define stress as applied to materials in physics
Stress is force per unit area. Dr. Bbosa Science 256 778 633 682 Read More
Multiparty politics-advantages and disadvantages
Multiparty politics refers to a political system where multiple political parties compete for power and representation in government. This system allows for a diversity of ... Read More
Single party system – advantages and disadvantages
It is a political system where only one party is legally accepted by the constitution of a country for example The People's Front for Democracy ... Read More
Factors that contributed for the growth of political parties in Africa
Several factors have contributed to the growth of political parties in Africa: Decolonization: The struggle for independence from colonial rule led to the formation of ... Read More
Post independence African Culture
Culture refers to the shared beliefs, customs, behaviors, values, norms, and material objects that characterize a group or society. It encompasses a wide range of ... Read More
Corruption in Africa – causes, features, effects and solutions
Corruption is the abuse of power or position for personal gain or benefit. It can take many forms and occurs in both public and private ... Read More
Neo-colonialism – features and effects
Neo-colonialism refers to the practice where powerful nations indirectly control or influence other countries, often former colonies, through economic, political, cultural, or military means rather ... Read More
Foreign Aid – advantages and disadvantages
Foreign aid refers to assistance in form of money, food, medicine etc. to recipient (developing) country by the donor (developed) country. Some aid may be ... Read More
The Buganda war of Secession (Independence) – causes and failure
The Buganda War of Secession refers to the series of conflicts and political struggles in which Buganda made several attempts to secede from Uganda to ... Read More
The Katanga war of Secession (Independence) – causes and failures
The Katanga War of Succession, also known as the Congo Crisis, was a complex conflict that took place in the early 1960s in the newly ... Read More
The Eritrean war of Secession (Independence) – causes, success and failures
The Eritrean War of Independence was an armed conflict and Insurgency aimed at achieving self-determination and independence for Eritrea from Ethiopian rule. Starting in 1961, Eritrean insurgents engaged in guerrilla warfare to liberate Eritrea Province from ... Read More
Describe briefly how to measure the limiting friction between wooden block and a plane surface.
A block of mass m is placed on a flat table and connected to a scale pan as shown in the diagram above. Small ... Read More
Use the molecular theory of matter to explain the laws friction s
State the laws of static friction. (03 marks) Friction force opposes relative motion between surfaces in contact. Friction force is independent of area of contact ... Read More
State the laws of static friction.
Friction force opposes relative motion between surfaces in contact. Friction force is independent of area of contact provided normal reaction is constant. The friction force ... Read More
What is meant by dimension of a physical quantity?
Dimensions of a physical quantity is the way it is related to fundamental quantities, mass, length and time Dr. Bbosa Science Read More
The Biafran War secession (1967-1970) – causes,failures and effects
The Nigerian Civil War, also known as the Biafran War, was fought from 1967 to 1970 between the Nigerian government and the secessionist state of ... Read More
The civil war in Chad (2005 – 2010) – causes and effects
Background This conflict started on December 18, 2005, and involved the Chadian government led by President Idriss Déby and several rebel groups. The war was ... Read More
The civil war in Chad (1965-1979) – causes and effects
Background This civil war was primarily fought between the government of President François Tombalbaye and various rebel factions. The conflict began due to Tombalbaye's authoritarian ... Read More
The civil war in Sudanese (1983-2005) – causes and effects
Background The Sudanese Civil War (1983-2005) was primarily a conflict between the central Sudanese government and the Sudan People's Liberation Army (SPLA), which sought greater ... Read More
The civil war in Angola (1975-2002)-causes and effects
Background The Angolan Civil War (1975-2002) was a complex and protracted conflict that emerged in the wake of Angola's independence from Portuguese colonial rule between ... Read More
The civil war in Mozambique 1977-1992-causes and effects
Background The Mozambican Civil War was a conflict that took place from 1977 to 1992. It was fought between the Mozambique Liberation Front (FRELIMO), which ... Read More
Ethiopian revolution of 1974– causes and consequences
Background The Ethiopian Revolution of 1974 was a period of significant political, social, and economic upheaval in Ethiopia that led to the overthrow of Emperor ... Read More
Achievements and failures of Haile Selassie 1892-1974
Achievement s of Haile Selassie 1892-1974 Haile Selassie I (born Tafari Makonnen on July 23, 1892, and died on August 27, 1975) was the Emperor ... Read More
State Newton’s law of motion
A body continues in its state of rest or uniform motion in a straight line unless acted upon by an external force The rate of ... Read More
What is angular projection
It is the motion of a body thrown at an angle to the horizontal. Thanks Dr. Bbosa Science Read More
Explain why a body moving with constant speed along a circular path has an acceleration.
Acceleration is a rate of change of velocity with respect to time. In the circular motion, the speed of the body is constant but velocity changes continuously due to changes of its direction. ... Read More
Define angular velocity.
Angular velocity is the rate of change of angular displacement. Dr. Bbosa Science Read More
With the aid of a labelled diagram, describe how the velocity of a fluid can be measured.
Experiment to determine the velocity of fluid A hole of diameter, r, is known is made through constant pressure apparatus Volume of liquid V flowing ... Read More
Explain with the aid of a diagram, why air flows over the wings of an aircraft causes a lift.
Air flows above the wing of a plane at high velocity hence low pressure. Below the wings, air flows at low velocity and hence high ... Read More
State Bernoulli’s principle.
For non- viscous incompressible fluid, flowing steadily, the sum of the pressure, kinetic energy and potential energy per unit volume is constant. Dr. Bbosa Science Read More
State the principle of conservation of linear momentum.
If the resultant force on a system of interacting bodies is zero; total linear momentum is conserved. Dr. Bbosa Science Read More
With examples, explain any two of Newton’s laws of motion.
1. A body continues in its state of rest or uniform motion in a straight line unless acted upon by an external force. For example, ... Read More
Algerian revolution of 1962– causes, success and cosequences
Background Algerian revolution refers to an armed conflict that took place from 1954 to 1962 that led to Algeria gaining independence from the French rule on ... Read More
Libya revolution of 1969 – causes, success and effects
Background Libya revolution of 1969 signifies the overthrow of King Idris who ruled Libya after the independence from British and French colonial rule in 1951. ... Read More
Zanzibar revolution of 1964 (causes, success and effects
Background After independence of Zanzibar in 1963 from the British, the Sultanate was dominated by the Arab minority, despite the African Majority population. This caused ... Read More
Causes and impacts of Tutsi invasion of Rwanda in 1990
Reasons for Tutsis invasion of Rwanda in 1990 The Tutsi invasion of Rwanda in 1990 was driven by several key factors: Refugee Status: Many Tutsis ... Read More
Causes and impacts of the Rwanda Revolution of 1959
Causes of the Rwanda Revolution of 1959 The Rwandan Revolution of 1959, also known as the Hutu Revolution or Social Revolution, was a period of ... Read More
The causes and impacts of the 1952 Egyptian revolution
Egypt was invaded and ruled by France between 1798 and 1801 with the aim of weakening the British rule to India. Then British formally occupied ... Read More
Factors that contributed to the success of revolutionary government in Egypt from 1952
The success of the revolutionary government in Egypt from 1952 can be attributed to several key factors: Strong Leadership: The revolution was led by capable ... Read More
Contributions of the Egyptian revolutionary government to growth of modern African Nationalism.
The Egyptian revolutionary government, particularly under the leadership of Gamal Abdel Nasser, made significant contributions to the growth of modern African nationalism. Support for Independence ... Read More
Factors for the rise of Gamal Abdel Nasser to power in Egypt
Nasser was born January 15, 1918, in Alexandria, Egypt and grew up in Al-Khatabah and later moved to Alexandria. He became interested in politics and ... Read More
Causes and consequences of Nationalization of Suez Canal in 1956
Factors that caused Nationalization of Suez Canal in 1956 The nationalization of the Suez Canal in 1956 by Egyptian President Gamal Abdel Nasser was driven ... Read More
The causes and consequences of the Suez Canal crisis of 1956
The Suez Crisis, also known as the Second Arab-Israeli War or the Tripartite Aggression, resulted in the nationalization of the Suez Canal by the Egyptian ... Read More
Explain why water flowing out of a small hole at the bottom of a wide tank results in a backward force on the tank.
When a fluid is flowing out of a small hole in a vessel, it acquires a large velocity and hence possesses large momentum. Since, no external force is acting on the system, a backward velocity ... Read More
What is elasticity?
Elasticity is ability of a deformed material body to return to its original shape and size when the forces causing the deformation are removed. Dr. Bbosa ... Read More
What is brittleness
A brittle material is a hard substance that breaks easily when a force is exerted on it e.g. glass Dr. Bbosa Science Read More
Account for the temperature dependency of surface tension.
Increase in temperatures increases the kinetic energy of liquid molecules and thus reduces the cohesive force and/or van der Waal forces among the molecules of ... Read More