LEARNING RESOURCES
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Polarization
When a wave which propagates in different planes passes through a polarising filter, we say that it has become polarised.
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Position vector and trajectory
The positon vector tells us where the moving body is at every instant. The trajectory marks the line the body has moved along
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Physical magnitudes
Properties which can be measured and expressed with a number and a unit, magnitudes. Length, mass, volume, the quantity of a substance, voltage, etc, are magnitudes.
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Photovoltaic cell
Light behaves in two ways: like a particle and like a wave. The way a photoelectric cell works shows the corpuscular behaviour of light.
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Phosphorescence
Phosphorescence is the luminescence produced by a mineral during a more or less long period of time, after the source of exciting radiation has ceased.
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Petroleum
Oil is the product of the decomposition of the remains of microscopic living organisms which millions of years ago inhabited the seas, lakes and river estuaries. Oil today has a multitude of applications. This is why is it essential not to waste it simply as fuel. The following visual shows how it is formed and how it is used.
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Perpetual motion
The educational resource shows an interactive animation about the perpetual motion: If such a system were possible, it would be a type of perpetual motion.
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Period and frequency
Relation between the magnitude frequency and the magnitude period
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Parabolic mirrors
The ancient Greeks knew that the parabolic mirrors are paraboloids of revolution which have the property of concentrating the rays at the focus of the paraboloid.
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Oscilloscope
Type of electronic test instrument that allows observation of varying signal voltages, usually as a two-dimensional plot of one or more signals as a function of time.
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Order of magnitude
Concept of order of magnitude
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Ohm's law (I)
Concept of Ohm's law. The following visual is useful for studying Ohm's Law.
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Ohm's law (II)
Concept of Ohm's law
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Observation
Observation concept
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Nuclear fusion
Concept of nuclear fusión
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Nuclear energy
Nuclear energy is the energy stored in the nuclei of atoms and it is released in the nuclear reactions of fission and fusion.
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Nuclear stability
Concept of nuclear stability
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Nuclear fission
Concept of nuclear fission
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Nuclear power station
The educational resource shows information about a nuclear power station, how it works and its advantages and its disadvantages.
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Nitid convex mirror
This visual is to explain how images are formed in the mirrors.
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