IKASKUNTZA BALIABIDEAK
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Work of friction
The forces of friction, which oppose displacement, also carry out work when a body is moving. The work of friction is converted into heat. The greater the force of friction, the more force must be exerted to move the body. Verify how friction affects the displacement of some blocks.
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Resistors in series
Here is a circuit with two resistors connected in series, a voltmeter and an ammeter.
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Radioactive constant
The radioactive constant or decay constant, is a coefficient of proportionality which relates the atoms which disappear in a period of time t, with the initial atoms for each radioactive nuclide.
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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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Mechanical energy
Mechanical energy is what is produced by mechanical type forces, like elastic and gravitational forces.The following three pictures show situations involving mechanical energy.
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The internal combustion engine
The educational resource shows an interactive animation about the internal combustion engine: in real combustion engines, the energy is extracted from the combustion of some type of fuel, which has been injected into a cylinder, finely pulverised and mixed with oxygen. Then the combustible mixture is compressed and ignited to explode. That is why these engines are known as combustion engines.
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Absolute error
Concept of absolute error
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Instrumental errors
Concept of instrumental errors
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Causes gravity matter
Concept that gravity is caused by the matter
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Inductive method
Concept of inductive method
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Mass and weight
The educational resource shows a visual about the difference between mass and weight: mass is not the same as weight, although in ordinary life both words are used with the same meaning.
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International System of Units
Concept of International System of Units
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Hydrostatic pressure I
Definition of hydrostatic pressure
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Fixed stars
The educational resource shows a visual about fixed stars: today we know that the sun is no more than a star which is near to us. Stars like the sun, which are large gaseous spheres are called fixed stars.
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Deductive method
Concept of deductive method
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Conservation of energy (II)
The principle of conservation of energy states that energy is neither created nor destroyed, it is just transformed from some types of energy into others. The following visual will help you to understand what is meant by the principle of conservation of energy when a body falls.
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From large to small
Travel from the universe to the atom
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Dimensional equation
Dimensional equation concept
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Amplitude of vibration
Concept of wave amplitude
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Longitudinal wave
Longitudinal wave concept
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