Energy Wind Energy Solar Energy Nuclear Energy Work, Energy and Power Work: Wind energy has traditionally been exploited for thousands of years as a source of energy in ship navigation, wind mills and throughout the last 30 years for producing electricity using wind turbines. Wind is a renewable energy because […]
Energy Wind Energy Solar Energy Nuclear Energy Work, Energy and Power Work: A man pushing a car along a level road is said to be doing work. The amount of work done depends on the force exerted and the distance through which the force acts. UNIT OF WORK: Since […]
Mechanism Gears Steam engine 4 Stroke engine Turbojet Exercices Turbo Jet. The heart of the aeroplane Newton’s third law says: For every force acting on a body there is an equal and opposite reaction. 1600 years before any flying machine could ever fly and before Newton announced the third […]
Mechanism Gears Steam engine 4 Stroke engine Turbojet Exercices Gears, Gears or toothed wheels are type drives which are used to transmit motion between two shafts or a shaft and a component having linear motion, by the meshing of two or more gears. The ratio of the rotational speeds […]
Mechanism Gears Steam engine 4 Stroke engine Turbojet Exercices Levers. Give me the place to stand, and I shall move the earth (Arquimedes) A lever is a simple machine that makes work easier; it involves moving a load around a pivot using a force. In a lever there is a […]
Materials Building Structure Forces Types Exercices Materials Exercises 1º The function of slates is to prevent water from penetrating the roof of houses. They are principally made of clay and they are cooked at a high temperature. What is the name of one of the components which facilitates […]
Materials Building Structure Forces Types Exercices Structural Forces The different parts of a structure are either in compression or in tension, or both. A steel cable one centimetre in diameter can support up to 9,000 kg or what is nearly the same, the weight of two Indian elephants!. […]
Materials Building Structure Forces Types Exercices Materials. Introduction Structureis comprised of pillars, beams and tie-beams made of reinforced concrete or iron. The structural system of every house is required to support and transmit various loads. These Loads can be classed as static or dynamic. In houses, the […]
Computers Drivers Computers Exercises Computers In this topic we’re going to study the fundamental parts of computers and what functions they have In general terms, the function of computers is to take in data that is inputted by peripherals (keyboard, mouse, stylus etc), process this data […]
Electricity exercises Read and complete: Voltage and current A battery is a source of electrical energy – it provides the ‘pressure’ which causes electricity to flow. We measure this electrical pressure in volts, V. The higher the voltage, the greater the pressure. The flow of electricity is called current […]