৬১৭৩
What is the minimum gap needed between the original sound and the reflected sound to perceive an echo?
উত্তর
0.1 second
৬১৭৪
Galileo concluded that heavier and lighter objects fall __________ if air resistance is negligible.
উত্তর
Equally
৬১৭৫
The Heisenberg Uncertainty Principle is most closely related to which concept?
উত্তর
Quantum indeterminacy