LEARNING RESOURCES
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What is radioactivity?
Concept of radioactivity. Radioactivity is the property which certain substances have for emitting radiation.
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What is energy?
A picture shows some transformations of energy. The energy from the sun passes to plants, to oil, to coal, to animals and to human beings; they take advantage of it by using the energy from oil, animals, coal, etc.
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What is friction?
Friction concept
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Waves in the sea
Concept of Waves in the sea. The waves on the sea or those which form on any surface of water, are a special instance of undulatory movement.
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Wavefront
Concept of wavefront: wavefront is the locus of points characterized by propagation of positions of identical phase.
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Wave function
Concept of wave function: there is a mathematical function associated with every particle which behaves like the functions of other undulatory phenomena.
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Wave equation
Concept of wave equation
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Voltmeter
The voltmeter is an instrument which measures voltages (tensions or differences of potential) between both ends of an element in a circuit through which there is an electric current circulating.
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Voltage measurement
Measure of the voltage. If you wish to measure the voltage in an electric circuit, you need a measuring device (multimeter)
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Harmonic vibration
A particle which oscillates around a point of equilibrium, subject to a force proportional to the distance to this point, has a simple harmonic vibratory movement.
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Vectors: composition
Concept of vectors: composition
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Vectors: what are they?
Vectors are a great help when you have to represent different physical magnitudes.
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Uniform Rectilinear Motion
Concept of Uniform Rectilinear Motion
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Uniformly Accelerated Rectilinear Motion
Concept of Uniformly Accelerated Rectilinear Motion. What is a uniformly accelerated movement?
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Units of measurement
Units of measurement indicate what is being measured. The number which precedes the unit of measurement indicates how much it measures.
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Uniform Circular Motion
What is a uniform circular movement?
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UCM acceleration
Acceleration in a uniform circular movement
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U.N.E. standards
The standards for measurements in Spain are called UNE standards. The Spanish Association for Standardisation and Certification (AENOR) establishs what characteristics measurement devices should possess and how they should be handled.
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Types of mirrors
Types of spherical mirrors. spherical mirror is a reflecting surface which could be formed like a section of a sphere separated from the rest by a plane. There are two types of spherical mirrors: concave and convex.
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Twins paradox
Concept of twins paradox
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