The chief advantage of hydro systems is it costs a lot less than other sources of energy. Hydroelectric plants are immune to price increases for fossil fuels and do not require imported fuel. On the other hand as hydroelectricity is increased petroleum/oil should be decreased. Hydroelectric plants generally have small to none emissions of carbon dioxide and methane due to reservoir emissions, and emit other pollutants associated with combustion. Hydroelectric plants may be able to reshape water flows to more closely match daily and seasonal system energy demands.
With the elemental reaction you get ZnI2 as your only product thus indicated that it is “pure” Zinc Iodide. In terms of ease, it would be easier to do the double replacement reaction simply for the fact that we wouldn’t have to swirl for at least 8 minutes to get ready to get results. With the double replacement reaction the swirling process becomes eliminated, and centrifuging takes less time. In terms of cost, it would be cheaper to do the elemental reaction if we’re thinking in terms of the 1:1 reaction. Theoretically speaking, if we use one granule of zinc and one granule of iodine opposed to one granule of Barium Iodide and one granule of Zinc Sulfate, the cost would be $.2123 in total for the elemental reaction and $.9265 for the double replacement reaction.
It was designed to provide 3,000Hz bandwidth, perfectly adequate for a voice signal. Copper has a maximum distance of 90 meters if you exceed the 90m meter limit you will start getting attenuation problems which means you will start losing signal strengths. Fiber optic cable has many more advantages than copper cabling. It is much more secure and has complete immunity to electromagnetic interference. With this type of cabling there are
Low density polyethylene (LDPE) – involves an older gas phase process (still used) with conditions: high pressure (1000-3000 times atmospheric), high temperature (300°C) and an initiator (an organic peroxide e.g. dibutyl peroxide, or oxygen). The resultant product has significant chain branching due to alkyl groups replacing hydrogen atoms on some carbon atoms. Consequently, the alkane chains cannot pack together in an orderly fashion, resulting in low densities and weak dispersion forces; therefore LDPE is soft, flexible and has a low melting point. The initiator isn’t strictly a catalyst as it is involved in the actual formation (one initiator molecule per ½ polymer molecule).
The inclusion of nuclear power within Australia could reduce power prices by 20% and save $150 billion from now until 2050 in greenhouse gas abatement costs. The modern reactors cost about $3 billion. When I say we need to go nuclear power, Australia doesn’t necessarily have to rely on Nuclear power as the only source, but could they go a mix of renewable energy and nuclear energy. Australia is home to many large industries and renewable energy its self would not be strong enough to power them. Nuclear power itself is very simular to renewable energy and emits close to no green house gasses.
However, carbohydrates cannot remain in our body for so long. Therefore, it is only able to store a limited amount of carbohydrates. The fuel value of carbohydrates is approximately 17 kJ/g while the fuel value of fats is around 38 kJ/g. This explains the reason why fats have a larger amount of energy than carbohydrates. These values can be determined by an apparatus which is called calorimeter.
0.10 M NaCN can only combine with 1/2 as many Ag+'s when it makes (Ag(CN)2-) so, yoiur answer is really 0.05 molar solubility of Agl in 0.10 M NaCN ======================================… 3) Predict whether solubility of BaF2 will increase, decrease, or remain the same with the addition of: a) HCl adds H+ , which removes F- ion, by converting it into HF the equilib: BaF2 <=> Ba+2 & 2F- will shift to the right to replace lost F- so,solubility of BaF2 will increase b) KF adds F-, which increases the F- ion, the equilib: BaF2 <=> Ba+2 & 2F- will shift to the left to reduce the added F- so,solubility of BaF2 will decrease c) NaNO3 solubility of BaF2 will remain the same, Na+ions & NO3-1 ions are not in the equilibrium ... and they do not combine with, to remove either Ba+2 ions or F- ions d) Ba(NO3)2 adds Ba+2, which increases the Ba+2 ion concentration, the equilib: BaF2 <=> Ba+2 & 2F- will shift to the left to reduce the added
Part B – Macroeconomics – Worth 10% of total assessment Answer any five (5) of the following questions. Each question is worth 10 marks Question 10 (a) Which of the following are final goods and services and which are intermediate goods and services? Please explain why in your answer. (4 marks – 1 mark each) (i) A windscreen purchased by a motor vehicle spare parts supplier; Answer: Intermediate – This is because its initial value would have been accounted for within the national accounts (for example GDP) and it is being resold at a depreciated value as second hand goods. (ii) A new bulldozer to be used by a construction company; Answer: Final goods - However, when a company buys and uses it, it can become intermediate goods as it is being utilized for the production of other goods.
Currently, uranium-235 is being used in nuclear reactors for this purpose of energy generation. Advantages of Nuclear Power Nuclear energy is an energy source that is clean and reliable which is able to replace a significant portion of fossil fuel in the production of energy. Even though nuclear reactions does not produce any greenhouse gas, some greenhouse gas are inevitably produced during the lifecycle, involving emissions somewhere else due to the massive construction and its operations (Sovacool, 2008). However, as compared to the combustion of fossil fuels, the amount of greenhouse gas produced from nuclear power is significantly lower. Furthermore, the energy produced by nuclear energy is much more than fossil fuel can
The contribution of ordinary Portland cement production worldwide to greenhouse gas emissions is estimated to be approximately 1.35 billion tons annually . To keep the global environment safe from the consequence of cement production, it is essential to explore the alternative materials that can completely or partially eliminate the use of cement in concrete and cause no environmental destruction . Geopolymers are formed when various alumina and silica containing materials react under highly alkaline conditions and forms a three dimensional network of Si–O–Al–O bonds . The most commonly used raw materials for geopolymers are clay and metakaolin . Electric arc furnace steel slag is an industrial by-product obtained from the steel manufacturing industry during melting of steel scrap from the impurities and fluxing agents.