The stethoscope works on the principle of reflection of sound. It consists of a chest piece that captures sound waves produced by the heart or lungs. These waves travel through a tube to earpieces, where they are heard by the ...
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A person should stand approximately 28 feet from a reflecting plane to hear their echo distinctly. This distance allows for a sufficient time delay between the emission of sound and the return of its reflection, making the echo perceptible to ...
Sound waves produce echo due to reflection. When sound waves encounter a large and hard surface, such as a wall or cliff, they bounce back towards the source instead of passing through or bending (refraction and diffraction). This reflection causes ...
The ball keeps dancing in the water spray at intersections because due to higher velocity of water, pressure becomes higher. The increased velocity of water results in higher pressure, creating a force that propels the ball and causes it to ...
The wall below the dam is made thick because the pressure of the fluid increases with increasing depth. This thick wall is necessary to withstand the increased pressure exerted by the water against it as the depth increases.