Heat Loss Investigation
Introduction
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In this investigation I will investigate heat loss and heat transfer
in different materials and I will also investigate which materials are
the best insulators. A material that prevents this heat loss is called
an insulator and this helps to keep the object that is being insulated
warmer for, longer. Heat is generally transferred in three different
methods: -
- Conduction
- Convection
- Radiation
Conduction is energy transferred from the hotter part of a solid to
the colder part of conduction. It is transferred by the particles in
the material the particles in the hot part are vibrating more. These
vibrations are passed on to the cooler particles next to them, so the
energy spreads through the material until all particles have the same
energy. Metals are good conductors, whereas most non-metals are poor
conductors and poor conductors are used as insulators.
Convection is the transfer of energy by the movement of a liquid or
gas. When a liquid becomes warm it expands and becomes less dense. The
warmer fluid floats above the cooler fluid, which sinks. This creates
a flow, which is called convection current.
Radiation is when bodies emit radiation. Basically the hotter the
body, the more energy it radiates. Dark, dull surfaces emit more
radiation than light, shiny surfaces. They also absorb radiation well.
Light, shiny surfaces do not absorb radiation well - they are good
reflectors.
Radiation can pass through space - that is how the warmth of the sun
reaches the Earth.
Also heat can be transferred by evaporation and this may be relevant
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...results as
it could have made it warmer or cooler.
The method I chose to use was successful and worked well within the
investigation it was stable and fair. I would not change the method if
I repeated the investigation as it worked well with the experiment.
Also to improve my investigation I could have done many things. I
could have repeated the experiment again and took down the average
results and this will make the experiment more accurate as one set of
my results could have been affected. Also there would have been
different temperatures within the beaker thought they would have only
been slight differences. The temperature would be different with the
water nearer to the glass compared to the water directly in the
middle. So it would have helped if I stirred the water so I could get
the general temperature.
down the surface but this is by means no means the only factor. It is
On Friday, December 7, the last monkey was finally put down. After this the decon team arrives. They seal off the building and heat these special crystals that kill everything that is living. Also, the team learns that Milton Frantig, the employee who had fallen ill, had recovered from what seemed to be the flu.
head, to the right shoulder, all the way down to the right part of the
Marks homeostatic control was imbalanced. His body temperature rised, therefore the chemical reaction occurred more rapidly and body proteins lost their characteristic shape and stopped functioning. Because he suffered a heat stroke and lost a lot of water, that affected his blood pressure by the water leaving the cells in his blood vessels which caused him to feel weak, nauseous, disoriented, etc.
3. Fill up the 50 milliliter beakers all the way up with deionized water. After, use your scopula to scoop out a small portion of one substance and put in into your beaker. Then put your hot plate onto medium temperature and rest the mixture onto the plate.
The Heat, a laugh-out-loud comedy brings the plots of laughter, friendship and criminals in an action crime buddy cop film. Directed by Paul Feig, Sandra Bullock and Melissa McCarthy are breaking female stereotypes, which is still scarce to the film industry.
as high as possible during the 20 minutes it will be timed for. And so
Investigating Heat Loss From a Container Planning We are investigating heat loss from a container and how it is affected. We could change: Room temperature Surface area Amount of water Use a lid Insulate around it Colour of tin We could measure / observe: Amount of time Temperature We will change: Surface area We will measure / observe: Temperature (every minute for 5 minutes) Our question is: Does surface area effect the rate of heat loss? We will keep these the same: Colour of tin Room temperature Amount of water Use a lid Insulate around it Preliminary investigation = == ==
After the water, has been boiling for 10 minutes, and the temperature inside the test tube has been stable for 5 minutes, record the temperature and remove the thermometer.
To begin this tedious process you must first put the two-thirds of a cup of
Sweating and Heat Loss Investigation Aim To find out whether heat is lost faster over a sweaty body compared to a dry body. Apparatus 2 Boiling tubes 47ml max 2 Measuring jug 50ml max A Beaker 250ml max 2 thermometers Paper towels A kettle to boil water A stopwatch 2 magnifying glasses (8x) 2 corks with a small hole through the centre A test tube rack Preliminary work In my preliminary work, I need to find out how much water to use, whether the tissue should be wet with hot/cold water, how often the readings should be taken, how accurate should the readings be, how many readings should be taken and what my starting temperature should be. My results are as follows. Starting temperature of 40°c Time (secs) Wet towel (°c) Dry towel (°c) 30 36 38.9 60 35 38.5 90 34 37.9 120 33.9 37.5 150 33 37 180 32.6 36.9 210 32.3 36.8 240 31 36.5 270 30.4 36 300 30.3 35.9 Starting temperature of 65°c Time (secs) Wet towel (°c) Dry towel (°c) 30 51.1 53 60 48.2 51.9 90 46.4 51 120 46 50 150 44.3 49 180 42.9 48.4 210 42.6 46.9 240 41.7 48 270 40.2 47.5 300 39.3 47 Starting temperature of 60°c Time (secs) Wet towel (°c) Dry towel (°c)
The purpose of the experiment is to identify and understand reactions under kinetic and thermodynamic control. A reaction under kinetic and thermodynamic control can form two different types of products. A reaction under kinetic control is known to be irreversible and the product is formed quickly. A reaction under thermodynamic control is known to require rigorous conditions. It is also reversible. The final product is more stable than the product made by kinetic control. The chart below shows the two types of reaction coordinates:
Heat is thermal energy being transferred from one place to another, because of temperature changes. This can take place by three processes. These three processes are known as conduction, convection, and radiation.
Heat energy is transferred through three ways- conduction, convection and radiation. All three are able to transfer heat from one place to another based off of different principles however, are all three are connected by the physics of heat. Let’s start with heat- what exactly is heat? We can understand heat by knowing that “heat is a thermal energy that flows from the warmer areas to the cooler areas, and the thermal energy is the total of all kinetic energies within a given system.” (Soffar, 2015) Now, we can explore the means to which heat is transferred and how each of them occurs. Heat is transferred through conduction at the molecular level and in simple terms, the transfers occurs through physical contact. In conduction, “the substance
down my Hair on the left Side, so that I was able to turn my Head about two