General Knowledge Multiple Choice Questions
General Science - Test - 05
Why a clean and dry needle floats when put gently on the surface of water ?
Because the surface of water behaves like a stretched membrane.
Because the gravitational pull on the needle is balanced by the upward thrust of water.
Because the needle is generally made of a magnetic substance and, therefore, its motion is guided by the earth's magnetic field.
Because the needle is in stable equilibrium.
Primary name : belgium
Sobriquet : the cockpit of europe.
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