Insulating Materials
Introduction
In this investigation I aim to find out which materials are the best
insulators. This practical investigation involves investigating what
kinds of materials are best at keeping water in a copper beaker warm.
A material that prevents this heat loss is called an insulator.
Insulators have to prevent three types of heat loss:
· Conduction
· Convection
· Radiation
Conduction - This is where heat energy passes through the walls of the
copper beaker by making the particles of the beaker vibrate which
makes the particles next to them vibrate causing the heat to pass
through the walls of the beaker to the surroundings. Materials that
are good thermal conductors tend to be good electrical conductors;
metals such as gold, silver and copper have high thermal
conductivity's and will conduct heat well. Materials such as glass are
poor heat conductors.
Convection - This is where the cooler water particles sink down to the
bottom and the warmer water particles float up to the top. Convection
may affect my experiment if I do no seal the copper beakers with a
lid. This is because the warm water will float up to the top and the
heat energy will escape through the top of the beaker.
Radiation - This is when the warm water particles vibrate the water
particles next to them. This will give them more energy and will make
the water around them warmer. The water particles at the top of the
copper beaker will radiate the heat energy into the surrounding air.
For heat to radiate it does not need to be in contact with matter.
Planning
In this investigation I will be looking at conduction of heat through
a copper beaker. This is because copper is one of the most effective
thermal conductors. Five results will be produced for each of six
materials:
· Polystyrene
· Bubble wrap
· Newspaper
· Carpet
· Tin foil
· Blanket
Two equations were used in this experiment to determine the initial temperature of the hot water. The first equation
3. The beaker was filled with water and the metal was placed in the water.
put in the pot. If the person knew if changing the volume of a substance will not change the boiling point, but only alter how much time it takes for the substance to reach the temperature. Then the person would know that it would be better to not put too much water in the pot, because it would take longer for the water to boil.
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...ssion. It is often richly decorated. The bowl and stem are always stored separately with the stem facing east when not in use.
Many Southerners don’t understand the new hazards that are brought on by extreme cold weather. Last year 8 people died due to cold weather and 29 in 2011. Some of these dangers include; chilblain, hypothermia, frostbite, trench foot, and snow blindness. Here are some suggestions that will keep you warm and safe!
Polyethylene (PE) is one of the most commonly used polymers which can be identified into two plastic identification codes: 2 for high-density polyethylene (HDPE) and 4 for low density polyethylene (LDPE). Polyethylene is sometimes called polyethene or polythene and is produced by an addition polymerisation reaction. The chemical formula for polyethylene is –(CH2-CH2)n– for both HDPE and LDPE. The formation of the polyethylene chain is created with the monomer ethylene (CH2=CH2).
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Aim: To find out what type of insulation holds the most heat for a can
3. Why are the crucible and lid heated at the beginning of the experiment before being weighed?
"Stagnant Lid Convection." Stagnant Lid Convection. Washington University in St. Louis, n.d. Web. 12 Apr. 2014. .
Identify the letter of the choice that best completes the statement or answers the question.
an actual coffee cup, not the insulated travel ones, because I like the warmth the coffee brings to
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