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Heavy-metal ions may be carried into surface or ground water
from mining fields or via the waste water of galvanicor similar
production sites. They block the effect of enzymes so that the
processes in the metabolism of the organisms that are controlled by
these enzymes may be ...
Demonstration experiment using wireless data transmission to a large digital to display. Heavy metal ions can seep into water courses, for example from galvanising plants or other similar industries. They have the effect of suppressing the action of enzymes, so that the ...
"A mass is not only inert but also heavy." Which is intended to
mean that not only is a force necessary to accelerate a mass, but
also that each mass in the earth's gravitional field experiences a
force, the force of weight. The force of weight is to be ...
Leaf springs are thin metal plates that are elastically deformed
under load: When a force is applied to a
leaf spring, then it is subject to deformation. A characteristic of
such an elastic deformation is that the
original shape is re-formed when the force is no longer active. ...
We deal with friction in our everyday lives and in technology.
Without exception every movement on Earth is connected to friction,
and therefore with a loss of energy and wear. Without friction,
however, movement would not be possible at all. You could not walk,
stop, hold on to ...
In this experiment observations are to be made on a spring
pendulum which consists of a helical spring
with a spring constant D and a mass m which is hung on it. When the
pendulum is displaced by smax and
let go of, it swings across its rest position with an oscillation
A quick loss of heat is sometimes not wanted. What can be done
to keep the temperature in a vessel
Measure the cooling of hot water in two different
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 of the
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 on time.
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 in
Quantities of heat distribute themselves so that finally all
parts that are in contact with each other have the same
temperature. If the heat capacities and the initial temperatures
are known, then the final temperature can be predicted. Or, in
reverse, the final temperature can ...
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 mass but different metals to
the same temperature in a water ...
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
temperature that is reached in ...
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 drop the
same distance numerous times and measure how quickly they warm
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 temperature
in dependence on time under uniform heat input ...
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