ENERGY SECURITY Energy security means having access to the requisite volumes of energy at affordable prices in association with national security and the availability of natural resources for energy consumption. From the perspective of a government concerned and the management of strategic interests‚ energy security implies energy policies and standby measures that can be implemented in the event of a supply disruption—and at a cost that its citizens consider reasonable. Such measures include energy
Premium Peak oil Energy development Nuclear power
different sources of energy which can be used to generate electricity to sustain mankind and the economic activities. However‚ nuclear energy is considered as more reliable compared to other sources of energy. Moreover‚ energy sources can be classified as renewable and non-renewable sources of energy. Renewable energy sources are those which can be reused without depletion. Consequently‚ they cause less harm to the human health and less pollution to the environment. Wind energy is the energy from the wind
Premium Fossil fuel Wind power Renewable energy
* The sun has produced energy for billions of years. Solar energy is the sun’s rays (solar radiation) that reach the Earth. This energy can be converted into other forms of energy‚ such as heat and electricity. * In the 1830s‚ the British astronomer John Herschel famously used a solar thermal collector box (a device that absorbs sunlight to collect heat) to cook food during an expedition to Africa. Today‚ people use the sun’s energy for lots of things. solar energy can be used to: * Heat
Free Photovoltaics Solar cell Solar energy
Mechanical energy Mechanical energy is the energy that is possessed by an object due to its motion or due to its position. Mechanical energy can be either kinetic energy (energy of motion) or potential energy (stored energy of position). Introduction: We use a system consisting of two weights hanging at each end of a thin thread lying over a wheel. A photo gate is placed so that the light is interrupted by the spokes of the wheel. The data are recorded electronically and this makes it possible
Premium Potential energy Energy Harshad number
or itself‚ it has energy. When you think of energy‚ you might think of action- or objects in motion‚ like the baseball that shatters a window. There are different forms of energy. Turn on an electric light and a dark room becomes bright. Turn on a music player and sound comes through your headphones. In both situations‚ energy moves from one place to another; effect and reaction. The two different types of energy are kinetic and potential energy. Kinetic energy is the energy a moving object has
Free Energy Potential energy Kinetic energy
Work‚energy and power-Test 1 MATHMANIA September 24‚ 2013 Instructions - All questions carry 1 mark each TOTAL - 20 marks 1. A rod of mass m and length l is lying on a horizontal table. Find the work required to make it stand on one end. 2. A body is moved along a straight line by a machine delivering constant power. The distance moved by the body in time t is proportional to what power of time? 3. When kinetic energy of a body is increased by 300%‚ its momentum increases by what %? 4.
Free Force Energy Mass
1 Renewable Energy and Climate Change Coordinating Lead Authors: William Moomaw (USA)‚ Francis Yamba (Zambia) Lead Authors: Masayuki Kamimoto (Japan)‚ Lourdes Maurice (USA)‚ John Nyboer (Canada)‚ Kevin Urama (Kenya/Nigeria)‚ Tony Weir (Fiji/Australia) Contributing Authors: Thomas Bruckner (Germany)‚ Arnulf Jäger-Waldau (Italy/Germany)‚ Volker Krey (Austria/Germany)‚ Ralph Sims (New Zealand)‚ Jan Steckel (Germany)‚ Michael Sterner (Germany)‚ Russell Stratton (USA)‚ Aviel Verbruggen
Premium World energy resources and consumption Fossil fuel Global warming
Tutorial – Work‚ Energy (Assume the acceleration due to gravity‚ g = 9.81 m/s2 ) 1. Calculate the work done when a force of 40 N pushes an object a distance of 500 m in the same direction as the force. 2. Calculate the work done when a mass is lifted vertically by a crane to a height of 5 m‚ the force required to lift the mass being 98 N. 3. A spring‚ initially in a relaxed state‚ is extended by 100 mm. Determine the work done by using a work diagram if the spring requires
Premium Potential energy Energy Force
Describe and explain the factors that influence how much a work a river can do (25) The work that a river does is erosion‚ transportation and deposition. The amount of work a river can do is dependent on the energy it has and this energy is determined by many factors. The study of water flow in a river channel is known as hydraulics. Hydraulic geometry is the study of the relationships that exist within river channels that ultimately determine how much work the river will be able to carry
Free Energy Potential energy Kinetic energy
ENERGY MANAGEMENT IN THERMAL POWER PLANT INTRODUCTION Thermal Power Plants are the most important source of power generation. They are based on the Rankine Cycle where high pressure and high temperature steam raised in a boiler is expanded through a steam turbine that drives an electric generator. In a thermal power plant‚ the chemical energy stored in fossil fuels such as coal‚ fuel oil‚ natural gas is converted successively into thermal energy‚ mechanical energy and finally electrical energy
Premium Nuclear power Water Water pollution