physics , help!

[izzahzainab]

syllabus, theme 8,
describe the processes by which energy is converted from one form to another, including references to
1.chemical/fuel energy (regrouping of atoms)
2.hydro.electric generation (emphasizing the mechanical energies involved)
3.solar energy (nuclei of atoms in the sun)
4.geothermal energy
5.wind energy

this theme isn't covered by my book, if anyone can tell me where i could study them from???

 

[abcde]

AOA!
Some information on this matter can be found in 'Explaining Physics' by Stephen Pople (specifically pages 68-70).

 

[izzahzainab]

any sources online?

 

[Firebender]

1) breaking of weak bonds(takes up energy) and forming of strong bonds(gives out energy). basically, exothermic chemical reactions release energy which we use to boil water. the boiled water turns into steam which we bottle up to build pressure and release at high speeds thru narrow tubes where the steam has to turn a turbine in order to get out. The turbine produces electricity. (need to understand AC Generator and Electromagnetic induction. whenever a conductor moves relative to magnetic field, voltage is induced in the conductor.)

2) We use a dam to build up water pressure, then release it through a narrow tube where the water has to turn a turbine to get out. The turbine spins and produces electrical energy. This is a renewable and clean source of energy.

3) Hydrogen atoms are fused together in the suns core in a process called nuclear fusion. This releases enormous energy, and forms heavier elements than hydrogen, like helium.
1+1(fusion of hydrogens whose mass is 1)= 2 (creates helium whose mass is 2)
This is different from nuclear fission where we absorb energy by splitting really heavy atoms. Its important to know that man has never carried out fusion successfully to create electric power.

4) The earth's crust DOES have cracks, and beneath the earth's crust is a really hot layer called the mantle, a swirling mass of lava and hot rock. When heat escapes from the mantle to the surface, we can tap into it to produce electricity. This is called Geothermal energy and it is a RENEWABLE and clean source of energy. Basically, we use the heat to boil water which turns into steam. We then shoot the steam in narrow tubes which turns turbines and creates electricity.

5) We set up tall towers in windy areas with blades designed to be caught in the wind. The wind turns the blades, which turns a turbine and produces electricity. RENEWABLE and clean.

 

[izzahzainab]

thankyou sooooo much!