RECURSOS DE APRENDIZAJE
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Pressure and walls
Any body submerged in a fluid is subject to many small forces acting on each face. Force acting on the walls of a submerged object
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Pressure and depth
Hydrostatic pressure varies with depth and the density of the liquid. In this visual and using a somewhat strange receptacle, you can verify this equation
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Pressure: what is it?
Pressure Concept
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Power (II)
Power measures the speed with which work is done. It is measured in watts, W, in the International System of Units. The following visual will help you to understand this concept more clearly as you see the work done by a jack to lift a car.
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Power (I)
The speed with which work is done is called power. To lift the same object to the top implies carrying out the same amount of work. To lift it at a different speed, implies using a different amount of power.
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Power switch
The power switch is one of the elements of a consumer unit.
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Potential energy
The educational resource shows a visual about the potential energy: two balls are on the point of falling, they possess gravitational potential energy. When they reach the snow they will modify their state. What will this depend on?
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Plasma
The atoms are usually neutral state. The agitation of a gas increases when it absorbs heat. If enough heat is absorbed, electrons are stripped from atoms and matter is ionized, saying that it is in plasma state.
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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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