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Balancing a metre scale on two fingers —
When we place a scale balancing on our two fingers,why can’t we move them simultaneously, without the scale falling?
Answer:
We can! if the hands are not tilted and if the movement is without a jerk, the scale will not fall no matter how fast the fingers are moved.
This happens because, the centre of mass of the system is not changes because of the happenings within the system without the aid of any external agency.
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Apparent weight in an elevator
You are standing on a bathroom scale in an elevator the is moving upward at constant speed, when suddenly the cable breaks. from just before to just after the cable breaks, the reading on the scale will be?
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Recent Research Publications in Physics
The absolute scale of neutrino masses is very important for understanding the evolution and the structure formation of the Universe as well as for nuclear and particle physics beyond the present standard model.
Elastic Scattering of He at the surface of liquid helium
Elastic scattering of 4He atoms when they approach the surface of 4He liquid, has been studied. The liquid surface is assumed to be uniform and the density profile is the same along and perpendicular to the surface. The incident 4He atom will interact with a large number of 4He atoms in the liquid near the surface of liquid 4He. Hence, the effective interaction of the incident particle will be due to many-body forces.
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