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Q. A small piece of a substance is weakly attracted by a strong magnetic field. The substance is
A small piece of a substance is weakly attracted by a strong magnetic field. The substance is paramagnetic.
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Q. When a steel ball is placed on the surface of mercury, it does not sink because
Q. Surface tension in a liquid is due to
Q. Thermal expansion of materials arises from
Q. When a person sitting on a swing stands up on the swing, the frequency of oscillation
Q. For which invention is Otto Hahn famous?
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