Investigating Surfaces for Insulating Boiling Water in a Flask
Aim
I'm investigating which surface (matt black or silvery) is best at
insulating boiling water. I will investigate this by covering two
equally sized conical flasks in different materials; one in matt black
and one in silvery. After that I will fill each of the flasks with an
equal amount of boiling water. At regular intervals of 1 minute I will
measure the drop in water temperature in each flask.
Prediction
I predict that the flask with the silvery surface will take longer to
cool and overall there will be a smaller drop in temperature because
the silver surface will reflect nearly all heat radiation back into
the flask keeping the water warm whilst a dull black surface is a very
good emitter of heat radiation so a lot of heat will be lost to the
surroundings.
Method
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Apparatus
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* Conical flasks
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-One silver foil
-One matt black
* 2 Thermometers
* Cotton wool
* Stopwatch
* 400cm³ Boiling Water *
* Measuring jug
For the experiment, firstly get 2 equally sized conical flasks. Then
cover one of the flasks in matt black and one in silvery foil.
Secondly, boil 400cm³ (*possibly more as water can evaporate) of water
and put exactly 200cm³ in each flask. Then put a thermometer in each
of the conical flasks, and fill the top with cotton wool; this is to
insulate the flask thoroughly and stop water evaporating through the
top part of the flask. The thermometers have to be left to settle
before taking the first reading at zero minutes. After that at 1minute
intervals, read each thermometer and record the temperature. Repeat
this 3 times, so the test is fair and more precise. Afterwards, work
out the average for each reading. For Safety hand gloves should be
worn for handling hot water. Also make sure that the flasks containing
An Investigation Into How the Thickness of Insulation Affects the Time a Drink Takes to Cool Down
more lines of reaction than if there was less heat. This is due to the
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solution placed in each flask to make it a fair test , I will also
It allows large amount of energy to be stored with only small changes in temperature thus allowing the system to have a high storage density.
Our product of interest we chose to market is Hydro Flasks, which is a stainless steel, vacuum insulated, double walled water bottle that is covered under lifetime warranty. This product will withstand consumer needs because not only do Hydro Flasks exceed the task of keeping beverages cold and or hot for 24 hours, but they provide customers the opportunity to do it in a fun and colorful way. Hydro Flasks come in fourteen different colors, while also varying in different sizes. Pricing on these water bottles range anywhere from $29.95- $59.95, which may also vary dependent on if you choose to customize it or even purchase different lids. Although Hydro Flasks are ranked on the pricier side, it is worth the risk in order to avoid lukewarm water. Hydro Flasks are a widely known brand, but rarely do you ever see commercials for it. This brand is mostly promoted by the consumers themselves, in a sense that everywhere you go someone is carrying around a Hydro Flask thus promoting product and making others aware of this widely known brand. Hydro Flasks can be found worldwide anywhere from Nordstrom, Hydro Flask website, Amazon,
Radiators are an important part of technology today, and will continue to be in the future. They’re a key part of central heating in homes, keeping large areas warm in the winter and cool in the summer. They also play a vital role in automobiles, keeping engines from overheating while we drive. The thermochemistry of radiators may be incredibly simple, but that just means the calculations are easier. And why wouldn’t it be simple? It’s just heating and cooling water to heat and cool other
Lastly, the flue les gas fires offer the best heating effect and offer an efficiency of complete 100%. However, these gas fires are a bit backwards in terms of looks and design, and require a 5 inch hole or vent in the wall for proper ventilation.
absorb the energy from the sun, but it does absorb some of the heat energy
As the pressure drop increases in the column, it is observed that the degree of foaming becomes more violent and more spread out. When the pressure drop is relatively high, it means that the pressure exerted by the vapour is insufficient to hold up the liquid in the tray, causing the gas bubbles to appear on top of the sieve trays. To add on, the higher the pressure drop, the higher the velocity of the vapour passing up the column. As a result, more vapour will penetrate the liquid and more bubbles formation is observed. Due to more bubbles formation, the degree of foaming are more agitated, rapid and spread out.
This condition is appropriate for classical calculation of thermal equilibrium through absorption and emission of EM energy.
Saini, Keshav. "Solar Thermal Energy Pros and Cons | Environmental Issues." Environmental Issues Blog. N.p., 6 Jan. 2012. Web. 04 Mar. 2014. .
heat will stay in the cup and can only escape by rising to the surface
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...ct solar radiation onto a single point above the mirror. The parabolic dish receiver is ran by a computer and uses a dual-axis system for tracking the sun. A Stirling engine is used for some of these systems to generate electricity. With these receiver focal points, temperatures can reach higher than 100°C. At this temperature, energy created is efficient.