The physical phenomenon It is anyone in which energy conversions, changes in electromagnetic waves occur when interacting with bodies, or changes in matter without it being affected in its composition or chemical identity.
Thus, mechanical energy can be used to crush a walnut, and not for that reason its molecules create or break bonds; While if the nut is heated by thermal energy, we will be facing a chemical phenomenon due to its combustion. Virtually all macro-scale interactions between bodies (not addressing quantum physics) are examples of physical phenomena.
Light interacts with the dust and ice particles that cover the atmosphere, causing the sky to appear bluish. The greater this interaction (larger particles or longer light paths), the colors will turn reddish, as happens in sunrises and sunsets; this is, the Rayleigh scattering.
We can mention among other examples of physical phenomena: preparing a juice in the blender, cutting bread slices, the movement of windmills, the ascent of rockets, the melting of snow, inhaling helium, the propagation of sound in different media, ferromagnetism, nuclear reactions, the Doppler effect, cloud condensation, and many more.
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In the physical phenomenon, changes can occur in the body, matter or substance during a process, without any changes in their composition..
The process that occurs during a physical phenomenon is reversible. Liquid water can be transformed into a solid (ice) by freezing, which is a physical phenomenon. This is achieved by lowering the water temperature to 0 ° C or less..
If the ice is then heated, it is transformed back into liquid water, through melting; other physical phenomenon. Therefore, it is concluded that a characteristic of this type of phenomenon is its reversibility..
The physical phenomenon is also repeatable. The previous example indicates that the freezing and melting cycle can be repeated many times, without the water experiencing any structural or compositional change during the process..
The changes that occur during the occurrence of a physical phenomenon are perceptible. The man is aware that it is raining; casting your shadow, or watching a rainbow.
When water drops are present in suspension in the atmosphere, it may happen that these drops serve as prisms, and that when the light falls on them at an appropriate angle, they decompose the visible light into the seven colors that form it. This is how the rainbow originates: a beautiful atmospheric phenomenon.
The light when passing from one medium to another experiences a deviation in its direction, because the speed of light is not the same in the two media. This phenomenon is manifested when an object is observed in the water, which suggests that it is closer and in a direction that is not the real one..
It is the phenomenon of obstruction of the passage of light through a body, manifesting this phenomenon by the shadow that the body projects on a surface.
This phenomenon of light absorption by substances in solution has been used to determine the concentration of substances by the absorption spectrophotometry method..
The Earth constantly rotates on itself in relation to an axis of rotation. This movement results in the existence of day and night. The day is characterized by the presence of sunlight and the night by its absence.
At the same time that the Earth's rotation occurs, it moves around the Sun in a movement known as translation, which lasts for 365 days. The consequence of the translational movement is the existence of the seasons of the year: summer, autumn, winter and spring..
A body can be deformed by the application of a force. But if it is an elastic body, within it a force can be generated that opposes the deformation and that produces the recovery of the original shape of the body, once the deformation force ceases..
Inflating a balloon supplies air. The air exerts pressure on the wall of the balloon, which is translated into a force that stretches the wall. But at the same time, a force that opposes its distension grows on the wall of the globe..
This force tends to restore the balloon to its original shape, so when the balloon is released, the restoring force, which appeared on the wall, causes the air to escape from inside the balloon and it returns to its original shape. A similar phenomenon occurs in the lungs during the phases of inspiration and expiration..
It is an attractive force of the Earth that maintains the bodies on the surface of the same avoiding that they float, as it happens in the outer space. The existence of this force is manifested when going up and down a ladder. The effort to climb the ladder is greater than that required to lower it.
This is explained because when climbing a ladder the movement occurs against gravity, while when lowering it the action is carried out in favor of gravity.
The greater the mass of a body, the greater the magnitude of the force of gravity acting on it..
A stream of water is made up of a set of particles or molecules that are moving in one direction. These moving particles have a certain kinetic energy that together can have an energy of great magnitude.
Hydroelectric plants use energy from water from dams to generate electricity. This is a positive effect of hydropower. Negatively, by acting uncontrollably, it can cause serious damage to bridges, homes, roads, etc..
It is the passage of the molecules that constitute a liquid to the air that surrounds it. For this phenomenon to occur, the energy of the molecules of the moving liquid must be sufficient to overcome the intermolecular attractive forces..
Evaporation is favored by an increase in temperature, since the energy of the liquid molecules increases. In this sense, sunlight when heating the water increases evaporation and cloud formation..
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