priority energy source over carbon emitting fuels like Oil‚ Gas‚ and Coal. Some of the technique’s that could be used are involving Nano technology “In standard cells‚ the impact of a particle of light (a photon) releases an electron to carry electric charge‚ but it also produces some useless excess heat. Lead-selenium Nano crystals enhance the chance of releasing a second electron rather than the heat‚ boosting the electric current output. Other experiments suggest this phenomenon can occur in
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[pic] Contents |PART I PLANET EARTH | |Chapter 1 Fundamentals of chemistry | | |The scientific method |1 | |Kinetic theory of matter
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Reduction/Oxidation Reactions • Oxidation number: The charge that an atom in a molecule would develop if the most electronegative atoms in the molecule took the shared electrons from the less electronegative atoms. • Oxidation numbers are not real; they are only based on assumptions. They are useful bookkeeping tools though‚ and can help us keep track of electrons during a reaction. • The sum of all oxidation numbers in a molecule must equal the charge of that molecule. • Rules 1-4 about oxidation numbers:
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JAPS - Mobocharge This device does not really need a DC charger to recharge the battery‚ In other words you need not charge your mobile phone at all. Imagine a phone that charges itself upon continuous tapping on screen. So how does this wonder phone work? This is a TFT capacitive touch screen phone and uses human body heat as electricity to charge the mobile phone. It’s based on the nanotechnology engineering using a micro device called thermoelectric device. The thermoelectric device is
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Physics Moment of a force: Moment of a force = force x perpendicular distance of the line if action if the force from fulcrum Law of moments: When a body is in equilibrium the sum of the clockwise moments about any point equals the sum of the anticlockwise moments about the same point. Centre of mass: Centre of mass is the point where whole mass of the body assumes to be concentrated. II. If the vertical line through the centre of mass is outside the base it will be a topples but if it’s passed
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Debenture - If a company borrows money‚ it will give its creditor a document confirming the existence and terms of the loan. This document is called a debenture. The execution of debentures & creation of charges over land by borrowers in favour of banks to secure banking facilities/loans is a common practice. Typically such debentures empower the banks to appoint receivers & managers to act on behalf of the borrowers to sell charged land by private treaty. (Teo & Khaw) Question: in
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one spot‚ they are said to be static. In charging by induction‚ when a negatively charged rod is brought near a metal leaf electroscope the electrons in the electroscope move away from the rod. A statement that is not part of the Law of Electric Charges is that neutral objects are attracted to uncharged objects. The purpose of a GFCI is to protect people from getting electrocuted. True: Lightning can travel from cloud to cloud. Secondary cells can be recharged. A long wire has a higher resistance
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Secondary Source The Science of Electricity How Electricity is Generated/Made The Transformer - Moving Electricity Measuring Electricity energy calculator links page recent statistics A SECONDARY SOURCE Electricity is the flow of electrical power or charge. It is a secondary energy source which means that we get it from the conversion of other sources of energy‚ like coal‚ natural gas‚ oil‚ nuclear power and other natural sources‚ which are called primary sources. The energy sources we use to make electricity
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MTN Learn Physical Sciences Grade 12 radio support notes MINDSET LEARN XTRA GRADE 12 PHYSICAL SCIENCES RADIO BROADCAST NOTES CONTENTS Introduction ................................................................................................................ 3 Broadcast Schedules ................................................................................................ 5 Preparing for Examinations ..................................................................................
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magnetic properties of lodestone (magnetic iron ore) were known‚ the magnetic compass had been in use for some time by navigators‚ and the amber effect (now called the triboelectric effect)‚ by which amber and certain other materials acquire a static charge when rubbed was also known. But no one could adequately explain how or why such things worked. Gilbert’s experiments meant that he developed a number of his own theories. One important theory was that the magnetic effect exhibited by the lodestone
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