How echo is produced?
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What makes the telegraph wires hum?
I observed this question to be asked in many exams - We cannot move even a finger without disturbing all the stars?Explain it.
Explain what is the ray of light?
what happens to the period of a simple pendulum taken into a deep mine ?
Explain the difference between the atomic theory and the kinetic theory?
How does the towel dry out hands ?
What is reverberation?
Explain the difference between a lens and a mirror?
What are the assumptions of quantum theory of black body radiation? : quantum physics
What is the second law of thermodynamics?
Does gas have density?
Distinguish between optical and acoustic resonance.