شرح ساينس الصف الثاني الاعدادي لغات
شرح ساينس تانية اعدادي

لينك تحميل الملزمة
https://drive.google.com/file/d/1guFZFe2N5QKd3M1dHBqR0ZCqUBgkI9k3/view?usp=sharing

لينك تليجرام
https://t.me/mrahmedelbashagroup

In This Video :
In this lesson, we will study:
1. The role of waves in transferring energy.
2. The concept of wave motion.
3. Types of waves.
4. Some concepts related to wave motion and their properties.

1 The role of waves in transferring energy:

Observation:
The pieces fall one after the other, as well as they don't change their positions after falling.
Explanation:
1. When the first domino piece falls, it will transfer its energy to the second piece, which falls transferring its energy to the third one and so on.
2. The transfer of energy continues and the pieces do not change their positions in the row.
Conclusion:
The disturbance that propagates and transfers energy in the direction of propagation is known as the wave.
The wave:
It is the disturbance that propagates and transfers energy in the direction of propagation.
Observation:
1. The flame of the candle vibrates.
2. The vapor of burning incense stick does not enter the tube which indicates that air molecules do not move with the sound waves through the tube.
Explanation:
1. Energy is generated when the tuning fork vibrates.
This energy is transferred in the form of sound waves.
2. The medium particles (air and smoke particles) vibrate without moving from their places during the propagation of sound waves, which carry energy to the candle flame.

Conclusion:
The movement resulting from the vibration of the medium particles at a certain moment in a specific direction is known as wave motion and the direction of progression of the wave is known as the line of wave propagation.


بالتوفيق
مستر احمد الباشا