Acquisition Of Knowledge Activity Phsiscs 4 Etapa.

Oscillations

Periodic motion: in physics, motion repeated in equal intervals of time. Periodic motion is performed, for example, by a rocking chair, a bouncing ball, a vibrating tuning fork, a swing in motion, the Earth in its orbit around the Sun, and a water wave.

Period: A period T is the time needed for one complete cycle of vibration to pass a given point. As the frequency of a wave increases, the period of the wave decreases.

Frequency: in physics, number of waves that pass a fixed point in unit time; also the number of cycles or vibrations undergone during one unit of time by a body in periodic motion.

Oscillator motion: is the repetitive variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states.

Simple harmonic motion: is a type of periodic motion where the restoring force is directly proportional to the displacement and acts in the direction opposite to that of displacement.

Motion amplitude: It is a measure of the maximum displacement or other change in the physical quantity that varies periodically in time or cuasiperiódicamente. The distance between the farthest point of a wave and break even or medium.

Simple oscillator period: It is a periodic motion, and vibration in the absence of friction produced by the action of a restoring force which is directly proportional to the position.

Hookes law: s a principle of physics that states that the force F needed to extend or compress a spring by some distance X is proportional to that distance.

Waves

Wave: wave can be described as adisturbance that travels through amedium from one location to another location.

Mechanical waves: is a wave that propagates as an oscillation of matter, and therefore transfers energy through a medium.

Electromagnetic waves: is a form of radiant energy released by certain electromagnetic processes.

Transverse waves: is a moving wave that consists of oscillations occurring perpendicular (or right angled) to the direction of energy transfer.

Longitudinal waves: also known as "l-waves", are waves in which the displacement of the medium is in the same direction as, or the opposite direction to, the direction of travel of the wave.

Reflection: is the change in direction of a wavefront at an interface between two different media so that the wavefront returns into the medium from which it originated.

Refraction: is the change in direction of propagation of a wave due to a change in its transmission medium.

Diffraction: refers to various phenomena which occur when a wave encounters an obstacle or a slit. In classical physics, the diffraction phenomenon is described as the interference of waves according to the Huygens Fresnel principle.

Superposition: for all linear systems, the net response at a given place and time caused by two or more stimuli is the sum of the responses which would have been caused by each stimulus individually

Interference: is disturbance that affects an electrical circuit due to either electromagnetic induction or electromagnetic radiation emitted from an external source.

Constructive interference: If we add these two waves together, point-by-point, we end up with a new wave that looks pretty much like the original waves but its amplitude is larger.

Destructive interference: Once we have the condition for constructive interference, destructive interference is a straightforward extension. The basic requirement for destructive interference is that the two waves are shifted by half a wavelength.

Sound

Sound: a mechanical disturbance from a state of equilibrium that propagates through an elastic material medium

Sound speed: is the distance travelled per unit time by a sound wave propagating through an elastic medium. The SI unit of the speed of sound is the metre per second

Tone: n acoustics, sound that can be recognized by its regularity of vibration. Asimple tone has only one frequency, although its intensity may vary.

Timbre: is the nuance that characterizes a

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