His mirror cost 1.1million
Answer: Nodes are produced at the water surface and antinodes are produced at the open end. When the frequency of waves in the air column becomes equal to the natural frequency of tuning fork, a loud sound is produced in the air column. It is the condition for resonance.
Explanation:
The call-out box draws attention to a particularly important piece of information; it basically a "look at me" sign.
<span>The ancient Persian philosopher Avicenna believed that looking at the color blue had beneficial effects.
Avicenna thought that if you looked at something blue, or surrounded yourself with blue color, or wore blue, it would have a positive effect on your health and overall life. It is a fact that brighter colors make people happier, so maybe he wasn't wrong.</span>
