of the project: Circuit description TEXAS INSTRUMENTS MSP430G2231 is the heart and brain of this circuit .the internal adc of the mcu with a resistor network voltage divider is used to measure the input voltage. Then 3 digest of comm anode 7 segment display is used to display final converted voltage. As you can see in the schematic the displays are multiplexed with each other. means we switch on one display and put the corresponding digit on this while other two displays are off this
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Extractive Metallurgy Minerals are naturally occurring chemical substances in the earth’s crust obtainable by mining. Out of many minerals in which a metal may be found‚ only a few are viable to be used as sources of that metal. Such minerals are known as ores. Examples: Galena‚ PbS‚ etc. It is usually contaminated with earthly or undesired materials known as gangue. The extraction and isolation of metals from ores involve the following major steps: • Concentration of the ore‚ • Isolation of the
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lead–acid cell‚ in terms of chemistry and the impact on society. Include relevant chemical equations in your answer. Dry cell – primary Lithium Battery – secondary Oxidation at the anode: Zn(s) Zn2+(aq) + 2e- Reduction at the cathode: 2MnO2 (s) + 2H+(aq) + 2e- Mn2O3 (s) + H2O (l) and NH4+ supplies H+ Oxidation at the anode: Li(s) Li+(s) + e- Reduction at the cathode: I2 (s) + 2e- 2I-(s) Lightweight and convenient to use for appliances with infrequent use e.g. torches‚ calculators Needs to be
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Study and revision skills INFO This section covers the following ideas and material: An introduction to revision methods‚ including • concept mapping‚ flow charts and mind maps • planned revision timing • practising examination technique. General study methods Organisation of study time The examinations are looming large. Suddenly you realise that you do need your notes and experimental work from the last year or two. Are they in good shape? Well...! It is worth remembering that revision
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xray------------------------------------------------- X-ray X-radiation (composed of X-rays) is a form of electromagnetic radiation. X-rays have a wavelength in the range of 0.01 to 10 nanometers‚ corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×1016 Hz to 3×1019 Hz) and energies in the range 100 eV to 100 keV. The wavelengths are shorter than those of UV rays and longer than those of gamma rays. In many languages‚ X-radiation is called Röntgen radiation‚ after Wilhelm
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been used by humans for more than 3500 years‚ where ancient civilizations in Asia and the Middle East boiled the roots to use to dye fabrics a bright orange‚ red or pink color (Phys Org). In a lithium-ion battery‚ a redox reaction is when the anode chemically reacts electrolytes‚ resulting in a loss of electrons (oxidation) (Physics Central). These electrons travel to the cathode‚ resulting in the gaining electrons (reduction). This redox reaction is the battery’s process of charge/discharge
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Metals are mined from ores‚ considering yield to see if it is economically viable for a business to mine at a particular site. However‚ due to environmental damage and global warming‚ recycling has increased globally to create a sustainable future. By examining the cost and energy expenditure of recycling and extracting aluminium we can understand why recycling is a better choice than extracting metal from its ore. Discuss the importance of predicting yield in the identification‚ mining and
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Normally‚ p–n junctions are manufactured from a single crystal with different dopant concentrations diffused across it. In the case of solar cells‚ polycrystalline silicon is often used to reduce expense‚ despite the lower efficiency caused by the grain boundaries. These boundaries are not related to the p–n junctions in the cell. If they would be the same spacially‚ the disturbing effects would make the solar cell useless. [edit] Properties of a p–n junction The p–n junction possesses some
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Career Episode 2 Chronology : xxxxxxxxx Geographical Location : xxxxxxxxxx Organization : xxxxxxxxxx Background ` : xxxxxxxx dr bo ok .c Title of Position om Introduction I had worked as vascular support engineer to support the cardio vascular imaging systems in the region assigned to me. I had taken the responsibility to manage the overall service delivery and ensure the customer satisfaction to the optimum level. I provided expert phone and/or onsite
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D. C. Polarography * Introduction: - Polarography is a particular case of general electro analytical technique known as voltametry. These methods are used to study the decomposition and quantitative analysis of solution. Principle: - It is a rapid and accurate technique in which electrolysis of experimental solution is carried out by using one electrode of comparatively large surface area (i.e. non-polarisable electrode) and the other electrode having a very small area (polarisable electrode)
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