What is the range of an ACID on the pH scale give one example
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Ответ:
On a pH scale acid is numbers less then 7 while the numbers larger then 7 are basic (alkaline)
Ответ:
Sound insulators prevent sound being transmitted better than elastic solids
Explanation:
We know that sound waves are longitudinal in nature. The particles of waves travel in a direction parallel to the direction of motion of the wave. It travels in the form of compression and rarefaction.
The speed of sound is maximum in solids. Sound insulators are substances that prevent the sound to travel. The materials that are less elastic can absorbs sound as compared to inelastic materials.
So, the correct option is (c) "Sound insulators prevent sound being transmitted better than elastic solids".