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At any instant, the ratio of the amounts of two radioactive substances is 2:1. If their half-lives be, respectively, 12 h and 16 h, then after two days, what will be the ratio of the substances?
18
Oct
At any instant, the ratio of the amounts of two radioactive substances is 2:1. If their half-lives be, respectively, 12 h and 16 h, then after two days, what will be the ratio of the substances? 12 h and 16 h At any instant respectively the ratio of the amounts of two radioactive substances is [...]
Plutonium has atomic mass 210 and a decay constant equal to 5.8 * 10^8 s^-1. The number of alpha particles emitted per second by 1 mg plutonium is
18
Oct
Plutonium has atomic mass 210 and a decay constant equal to 5.8 * 10^8 s^-1. The number of alpha particles emitted per second by 1 mg plutonium is Plutonium has atomic mass 210 and a decay constant equal to 5.8 * 10^8 s^-1. The number of alpha particles emitted per second by 1 mg plutonium [...]
Uranium ores contain one radium-226 atom for every 2.8 * 10^6 uranium-238 atoms. Calculate the half-life of 92U238, given that the half-life of 88Ra226 is 1600 years (88Ra226 is a decay product of 92U238).
18
Oct
Uranium ores contain one radium-226 atom for every 2.8 * 10^6 uranium-238 atoms. Calculate the half-life of 92U238, given that the half-life of 88Ra226 is 1600 years (88Ra226 is a decay product of 92U238). given that the half-life of 88Ra226 is 1600 years (88Ra226 is a decay product of 92U238). Uranium ores contain one radium-226 [...]
The pole strength of a bar magnet is 48 ampere-metre and the distance between its poles is 25cm. The moment of the couple by which it can be placed at an angle of 30∘ with the uniform magnetic intensity of flux density 0.15 newton/ampere-metre will be
18
Oct
The pole strength of a bar magnet is 48 ampere-metre and the distance between its poles is 25cm. The moment of the couple by which it can be placed at an angle of 30∘ with the uniform magnetic intensity of flux density 0.15 newton/ampere-metre will be A thin bar magnet of length 2 L is [...]
When a bar magnet is placed at 90 degree to a uniform magnetic field, it is acted upon by a couple which is maximum. For
18
Oct
When a bar magnet is placed at 90 degree to a uniform magnetic field, it is acted upon by a couple which is maximum. For it is acted upon by a couple which is maximum. For When a bar magnet is placed at 90 degree to a uniform magnetic field October 18, 2020 Category: Uncategorised [...]
Two magnets of equal mass are joined at right angles to each other . Magnet N1S1 has a magnet miment root 3 times that of N2S2. This arrangement is pivoted so that it is freee to rotate in a horizontal plane. when in equilibrium , theta is
18
Oct
Two magnets of equal mass are joined at right angles to each other . Magnet N1S1 has a magnet miment root 3 times that of N2S2. This arrangement is pivoted so that it is freee to rotate in a horizontal plane. when in equilibrium , theta is A thin bar magnet of length 2 L [...]
A freshly prepared radioactive source of half-life 2 h emits radiation of intensity which is 64 times the permissible safe level. The minimum time after which it would be possible to
18
Oct
A freshly prepared radioactive source of half-life 2 h emits radiation of intensity which is 64 times the permissible safe level. The minimum time after which it would be possible to A freshly prepared radioactive source of half-life 2 h emits radiation of intensity which is 64 times the permissible safe level. The minimum time [...]
Stationary nucleus 238U decays by a emission generating a total kinetic energy T : 238U92 to 234Th90 + 4alpha 2 What is the kinetic energy of the alpha particle ?
18
Oct
Stationary nucleus 238U decays by a emission generating a total kinetic energy T : 238U92 to 234Th90 + 4alpha 2 What is the kinetic energy of the alpha particle ? Stationary nucleus 238U decays by a emission generating a total kinetic energy T : 238U92 to 234Th90 + 4alpha 2 What is the kinetic energy [...]
Three identical bar magnets , each of magnetic moment M, are placed in the form of an equilateral triangle with north pole of one touching the south pole of the other ( see figure ). The net magnetic moment of the system is
18
Oct
Three identical bar magnets , each of magnetic moment M, are placed in the form of an equilateral triangle with north pole of one touching the south pole of the other ( see figure ). The net magnetic moment of the system is are placed in the form of an equilateral triangle with north pole [...]
If 10% of a radioactive substance decays in every 5 year, then the percentage of the substance that will have decayed in 20 years will be
18
Oct
If 10% of a radioactive substance decays in every 5 year, then the percentage of the substance that will have decayed in 20 years will be If 10% of a radioactive substance decays in every 5 year then the percentage of the substance that will have decayed in 20 years will be October 18, 2020 [...]