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Principle
Electronystagmography (ENG) is an electrophysiological diagnostic procedure for measuring the movement of the eyes. Several electrodes measure the potential differences that are caused by the eye movements. When looking at a moving, regular, repetiti ...
A quick loss of heat is sometimes not wanted. What can be done to keep the temperature in a vessel constant?
Tasks
Measure the cooling of hot water in two different environments:
How depends the time required to heat up water on the amount of water when a defined heating source is available?
Heat up various amounts of water with an electric heating coil and measure the time dependence ...
Do different liquids heat up to the same extent when subject to the same heating?
Heat 100 g and 100 ml of water and of glycerol with an electric heating coil and measure the temperature in dependence o ...
In households, a great amount of energy is used to heat up water - for showers, for washing clothes, for cooking. Exactly how much is necessary for each degree that each mililitre of water is warmed up? How are amount of heat, heat capacity and change ...
The calorimeter can be used to determinethe heat content of a piece of metal.The heat content can be calculated fromthe mixing temperature that is reachedin the calorimeter.
Heat up metal bodies of the same ma ...
Calorimetry can also be used to determine the temperature of a hot object that is difficult to measured by any other method, e.g. because it is too hot for the thermometers available. The heatcontent of the object can be calculated from the mixture t ...
Different forms of energy can be converted into each other. Here the potential energy of steel pellets is converted to heat when falling pellets collide.
Let the pellets dro ...
How does a temperature curve express the change of state of a substance that occurs when it is heated or cooled?
Heat sodium thiosulphate until it melts and let it cool down again. Measure the behaviour of the ...
Drinks can be cooled by putting the bottle in a moist sock and letting the sock dry. The same process occurs when our bodies are cooled by sweating. The change in temperature that occurs is to be examined in this experiment.
Extensive bodies have the property of weighing less when they are in water than when they are in air, which you notice when you swim, for example. For this reason, even heavy container ships can swim, although a small pebble immediately sinks. In this ...
The heart is a hollow, muscular organ that comprises several secondary muscles. These secondary muscles contract and relax successively, thus pumping the blood through the heart. These muscle activities can be measured electrically as a whole at the ...
With the exception of the heart muscle, the contractions of striated muscles can be controlled at will. This characteristic enables the observation of the activities of individual muscle groups. An electromyogram (EMG) can be used to measure (record) ...
With this experiment, you can find evidence of the electrical activity that is generated during the movement of your eyes. Several electrodes attached to the skin of the face measure all the changes of the electrical voltage that are caused by the mov ...
The characteristic curve of current against voltage of an electrolytic bath containing copper sulphate solution and having copper electrodes is measured. Visible changes in the electrodes and the bath are observed.
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