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2021-06-14 14:01:02 JEE NEET By AIR 89 pinned a photo Open / Comment

2021-06-14 13:28:14 Terminologies in Progressive Wave Motion

Amplitude
Period
Wavelength
Frequency
Wave velocity
Phase or phase angle (O)
Phase difference
Path difference
Time difference


Amplitude (A): The amplitude of a wave is the maximum displacement of any particle of the medium from its equilibrium position.

Period (T): Period (T) of a wave is the time taken by any particle of the medium to complete one vibration during a period (T).

Wavelength (λ): Wavelength (λ) is equal to the distance between two consecutive particles of the medium which are in the same state of vibration it is equal to the distance travelled by the wave by its time period (T).

Frequency (f): It is the number of vibrations made per second by any particles of the medium (f = 1/T). Since the frequency of a wave is a characteristic property of the source which is producing the wave motion, hence, the frequency of a wave does not change when a wave travels from one medium to another medium.

Phase or Phase Angle (Φ): It represents the state of vibration of the particle of a medium with respect to its mean position.

Phase Difference Δ(Φ): It represents the different state of vibration of a particle at two different instants (or) any pair of particles at the same instant. ΔΦ = Φ2 – Φ1.

Wave Velocity (v): It is the distance travelled by the wave in one second (v = λ/T). It is determined by the mechanical properties of the medium through which the wave propagates. The velocity of wave motion is measured with respect to the medium, the wave velocity changes when the medium is in motion i.e. speed of sound through air changes when the wind is blowing.

⇒ Check: Sound Waves

There are two velocities associated with a wave. One is the wave velocity and the other one is particle velocity (which is the speed with which the particle of the medium vibrate when the wave passes through the medium).

Path Difference (Δx) or (x): It indicates the distance between two points measured along the direction of propagation of the wave through the medium.

Time Difference (ΔT): It indicates the time taken by the wave to travel from one point to another through the medium.

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2021-06-14 11:40:41 Skeleton system facts

Fact-No-1

The skeletal system function as the basic framework of a body and is the combination of all the bones and tissues associated with cartilages and joints.

Fact-No-2

The skeletal system plays a vital role in the locomotion and movement of body parts in the human body. The movement and locomotion depend upon the association of the skeletal muscles present within this skeletal system.

Fact-No-3

Human skeleton system is composed of more than 200 bones. Each bone plays a very important role in maintaining the structure and functioning of the human body.

Fact-No-4

The human skull, ribs, shoulder blades are composed of flat bones, which are thin, curved, shaped and function by protecting internal organs and provide an anchor for muscles.

Fact-No-5

The entire human body is built around with a hard framework called the skeleton system. It plays a vital role in maintaining the overall shape of the human body.

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2021-06-14 11:15:01 Open / Comment

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2021-06-14 10:46:34 Hue school ki padhayi se bore
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2021-06-14 06:53:10 Best handwritten notes of
CIRCULATORY SYSTEm


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