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The Factor that Effect the Temperature of Water Heated by a Small Immersion Heater.

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The Factor that Effect the Temperature of Water Heated by a Small Immersion Heater Aim / Task: I am investigating, to find out what factors effects the temperature of water when heated by a small immersion heater under water. Preliminary Work The factors that I will vary are the volume of the water as we can see from this how the more the water there is, the less the temperature rises and when there is less water the temperature rises quicker. So then after that I could vary the time so we can see what happens over a longer time, when there is more water. So I will monitor the temperature to see how quickly or slowly the experiment goes. For this experiment I will be using an immersion heater, which will be under water. I also will have a measuring cylinder, which will be where the water and the heater will go. The heater will be connected to a circuit and a 12-volt power supply with ammeters and voltmeters, which can be seen in the diagram. There are some safety things such as; the immersion heater should be under water all the time, because then the heater starts to give off lots of smoke. Also the circuit must be set up right or it will short circuit and blow the fuses. ...read more.


I must use a thermeter because I am trying to see the temperature change when different amounts of water are used. I also used a measuring cylinder so I could measure the amounts of water accurately. I am going to measure the temperature change over a time span of 3 mins. Also I will be changing the amount of water after every 3 minutes tests. So seeing if the amount of water will affect the temperature of the water after the 3 minutes heating with the immersion heater. The only safe problems are that if the immersion heater is not under water the heater starts to smoke and also if the heater is too low in the water then the electricity and the water make contact and the circuit and heater blow. So the problem of people short-circuiting their experiment has come up. The most obvious is that of turning the heater off when not using and not touching it when hot. I can ensure that my results are reliable to a certain point, but there is also human error. I can cut this down by doing a repeat of the experiment so getting an average and we hope more reliable results. Also I will only do my results to 2 sig fig as with a thermometer it is the most reliable way, because if you do it to a decimal place then you get into the area of guessing. ...read more.


So the colder the water and the more water, then there are less collisions. So using my scientific knowledge I could explain way by conclusion was right. Evaluation I think my results are as accurate as I could have made them as I did the repeat, which meant I could do an average of the two sets of results. No I had no real unusual sets of result as my result were as accurate as I could have done them with the time. If I had got some unusual results I would account human error in the main, as it is very rarely apparatus problems. I could improve the experiment by maybe having a bigger immersion heat which would heat all of the water, but would give out the same amount of heat as the normal ones and smaller heater so I could do more volumes lower down the scale. Also having a way of keeping the thermometer at the same distance from the heater at all times. Also having bigger measuring cylinders so that I could do more volumes higher up the scale. The only way to get more reliable results are by doing more repeat to get more accurate results, but still then you can not get perfect results as things can always go wrong in an experiment. The way of extending it is by doing different factors such as Time and heat loss by doing experiments with the carpet around the cylinder to show the differences between the two experiments. . ...read more.

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