Manufacturing Ethanol

How can you manufacture ethanol? Methods §1.  Catalytic addition of steam on Ethene §2.  Fermentation of Glucose FERMENTATION OF GLUCOSE SOLUTION §Glucose solution  on fermentation gives ethanol & carbon dioxide §Exothermic reaction §Word equation    glucose  solution  à ethanol  +  carbon dioxide §Chemical equation: § C6H12O6 [aq] à2CH3CH2OH[aq] + 2CO2 [g] §Catalyst: Enzyme present in yeast §Temp range : 25 – 40 degree Celsius §Optimum temp 35 degree Celsius §Define Respiration? §Process by which living things break down food to produce energy. §What are enzymes? §Enzymes are proteins or biological catalyst. OBSERVATIONS DURING...

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Posted in: Chemistry

Electric Motor

Parts of the Motor Armature or rotor Commutator Brushes Axle Field magnet DC power supply of some sort Electric Motor An electromagnet is the basis of an electric motor A motor uses magnets to create motion. Opposites attract and likes repel. Inside an electric motor, these attracting and repelling forces create rotational motion. A motor consist of two magnets. Armature The armature is an electromagnet made by coiling thin wire around two or more poles of a metal core. The armature has an axle, and the commutator is attached to the axle. When you run electricity into this electromagnet, it creates a magnetic field in the armature that attracts...

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Posted in: Physics

World Population Growth

Natural population increase: When birth rates are higher than death rates, like in stage 2 and 3 of the DTM. Natural population decrease: When death rates are higher than birth rates, like in stage 5 of the DTM. A country's population can also be changed by immigration and emigration, but when there is reference to natural change, it only refers to changes caused by birth rates and death rates. Population explosion or population bomb: The rapid growth in population, this might refer to the rapid growth of the world's population in the lat 100 years, or the rapid population growth of just one country.•Reasons...

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Posted in: Biology,EVM