Students of ICSE might need online study materials to help them in their homework and assist them in their exam studies. Extramarks makes the study materials for ICSE Class 7 Physics in their ICSE Class 7 study package. The package also has ICSE Class 7 Physics Question Papers for students to practice before their exams. The ICSE Class 7 Physics Question Papers are very useful when it comes to getting a good grip on the exam paper pattern. Students can get the package details for Class 7 Physics on the Extramarks website.
Just like electricity, heat or light, a sound is a form of energy. That makes a loud ringing noise when you strike a bell. The body's to and fro motion is called Vibration. The sound moves through a medium, alternately by contracting and expanding parts of the medium through which it travels. This compression and expansion create a tiny difference in pressure which is perceived as sound. Let's talk about the sound wave characteristics such as amplitude, frequency, wavelength, and timbre. You hear all kinds of noises in real life, screaming, shouting, laughing, and this is not limited to humans. Animals also make noises that are distinctly different from the voice of humans. To understand all this, you'll have to explore some of the sound waves' basic properties. When sound waves are represented in a waveform, you notice certain basic characteristics instantly. The waveform is a pictorial representation of the varying pressure in the air that travels as sound. Those waves are high pressure and low-pressure regions in turn. Sound waves now appear very similar to light and other electromagnetic radiation, thanks to the waveform. This refers, in light, to the amount of energy in an electromagnetic wave and its meaning here is the same. Amplitude refers to the distance the wave has from its mean position to the maximum vertical displacement. The greater the amplitude, and the greater the energy. In sound, amplitude refers to the magnitude of the compression and expansion experienced by the medium through which the sound wave travels. Your ears perceive that amplitude as loudness. The representation of the waveform converts the varying pressure of sound waves into a pictorial graph that is easier to understand. ICSE Class 7 Physics has an extensive syllabus and must be studied properly. Students can also get ICSE Class 7 Physics sample papers from the Extramarks website.
