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In an experiment , 2 unbiased coins were tossed for 200 times. During the experiment, two heads were received 25 times, one head was received 100 times and no head was received 75 times. Calculate the probability of each event on the basis of the experiment.

A physical performs an experiment and taken 200 readings. He repeats the same experiment and now takes 800 readingbs. By doing so

A short electric dipole is placed in the electric field due to a point charge. Then (A) The dipole must experience a force (B) The dipole may experience a force (C) The dipole must experience a torque (D) The dipole may experience a torque

A coin is tossed 200 times and head appeared 120 times. The probability of getting a head in this experiment is

Explain an experiment to determine the focal length of a concave mirror by u-v method.

A beam of monoenergetic electrons, which have been accelerated from rest by a potential U, is used to form an interference pattern in a Young's Double slit experiment. The electrons are now accelerated by potential 4U. The fringe width -

Assuming the splitting of U^235 nucleus liberates 200 MeV energy, find (a) the energy liberated in the fission of 1 kg of U^235 and (b) the mass of the coal with calorific value of 30 kJ//g which is equivalent to 1 kg of U^235 .