* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Conservation of energy - Gymnázium Slovanské náměstí
Dark energy wikipedia , lookup
Open energy system models wikipedia , lookup
William Flynn Martin wikipedia , lookup
Potential energy wikipedia , lookup
Energy storage wikipedia , lookup
100% renewable energy wikipedia , lookup
Energy subsidies wikipedia , lookup
Low-Income Home Energy Assistance Program wikipedia , lookup
Public schemes for energy efficient refurbishment wikipedia , lookup
Low-carbon economy wikipedia , lookup
Zero-energy building wikipedia , lookup
World energy consumption wikipedia , lookup
Kinetic energy wikipedia , lookup
Energy Charter Treaty wikipedia , lookup
Regenerative brake wikipedia , lookup
Energy policy of Australia wikipedia , lookup
Alternative energy wikipedia , lookup
Gibbs free energy wikipedia , lookup
International Energy Agency wikipedia , lookup
Energy returned on energy invested wikipedia , lookup
Energy policy of the United Kingdom wikipedia , lookup
Energy efficiency in transport wikipedia , lookup
Distributed generation wikipedia , lookup
Energy harvesting wikipedia , lookup
Life-cycle greenhouse-gas emissions of energy sources wikipedia , lookup
Energy policy of Finland wikipedia , lookup
Negawatt power wikipedia , lookup
Energy in the United Kingdom wikipedia , lookup
Internal energy wikipedia , lookup
Energy policy of the European Union wikipedia , lookup
United States energy law wikipedia , lookup
Energy efficiency in British housing wikipedia , lookup
Energy Independence and Security Act of 2007 wikipedia , lookup
Škola: Šablona: Název projektu: Číslo projektu: Autor: Tematická oblast: Název DUMu: Kód: Datum: Cílová skupina: Klíčová slova: Anotace: Gymnázium, Brno, Slovanské náměstí 7 III/2 – Inovace a zkvalitnění výuky prostřednictvím ICT Inovace výuky na GSN prostřednictvím ICT CZ.1.07/1.5.00/34.0940 RNDr. Bc. Miroslav Hruška Dynamics of particles (dynamika hmotných bodů) Conservation of energy VY_32_INOVACE_FY.3.17 12. 12. 2013 Žáci středních škol s CLIL výukou fyziky v angličtině Energy, conservation of energy, isolated system Prezentace slouží k vyložení zákona zachování energie. 1 Dynamics of particles 17. Conservation of energy Exercise A Boeing 777 of a mass of 200 tonnes flies at a speed of 900 km/h in a height of 10 km above the Earth’s surface. Calculate its mechanical energy relative to the Earth. Solution E Ek Ep mv mgh 1 2 2 E 200,000 250 200,000 10 10,000 9 9 E 6.25 10 20 10 E 26 GJ 1 2 2 3 Fill in the gaps We refer to the ……… of the kinetic and ………… energy as to the …………… energy of a body (of a system) The ………… energy of an ………… system without ………… and air (fluid) resistance is ………… ………… mechanical energy, there are other ………… of energy, e.g. ………… 4 Fill in the gaps – solution We refer to the sum of the kinetic and potential energy as to the mechanical energy of a body (of a system) The mechanical energy of an isolated system without friction and air (fluid) resistance is constant Besides mechanical energy, there are other forms of energy, e.g. internal 5 True or false? 1. 2. 3. 4. According to the law of conservation of mechanical energy, if the kinetic energy grows, the potential energy decreases The law of conservation of mechanical energy can be applied to a pendulum Air resistance is a form of energy (non- mechanical) Internal energy is inside an object 6 Find the only correct answer I Mechanical energy is the: A) sum of the kinetic and internal energy B) subtraction of the kinetic and potential energy C) sum of the kinetic and potential energy D) subtraction of the kinetic and internal energy 7 Find the only correct answer II Isolated system exchanges neither A) energy nor matter… B) energy nor force… C) work nor matter… D) work nor force… …with its surroundings 8 Energy Besides mechanical energy, there are other forms of energy, such as o internal (vnitřní): thermal (tepelná) and binding (vazebná) (chemical and nuclear) o electromagnetic: solar, light, electrical, magnetic… Sound and pressure energy are mechanical energies… 9 http://www.youtube.com/watch?v=o_5oYuDY2qM 2-min song Energy "non-mechanical" internal thermal electromagnetic binding chemical electrical solar light magnetic nuclear 10 Law of conservation of energy “The energy of an isolated system is constant: E = const.” Energy cannot be created nor destroyed. It can only be transformed from one form to another 11 Make pairs of words for energy solar sound thermal internal pressure nuclear binding light vnitřní zvuková tlaková vazebná světelná tepelná sluneční jaderná 12 That is all for now Thank you for your attention Materiál je určen pro bezplatné používání pro potřeby výuky a vzdělávání na všech typech škol a školských zařízeních. Jakékoliv další využití podléhá autorskému zákonu. Zdroje: Bednařík, M., Široká, M. Fyzika pro gymnázia, Mechanika. Dotisk 3. vyd. Praha: Prometheus, 2004. 288 s. ISBN 807196-176-0 Hornby, A. S. Oxford Advanced Learner’s Dictionary of Current English. 5. vyd. Oxford: Oxford University Press, 1995. 1428 s. ISBN 0-19-431423-5 Autor nezaručuje funkčnost webových odkazů! 14