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Atomic and Nuclear Physics
A wooden artifact is found in an ancient tomb. Its carbon-14 activity is measured to be 60% of that in a fresh sample of wood from the same region. Assuming the same amount of C-14 was initially present in the artifact as is now contained in the fresh sample, determine the age of the artifact.
Atomic and Nuclear Physics
The radioactive isotope 198Au has a half-life of 64.8h. A sample containing this isotope has an initial activity of 40.0 Bq. Calculate the number of nuclei that decay in the time interval between in 2h.
Atomic and Nuclear Physics
A sample of radioactive material contains 1.00 x 10^15 atoms and has an activity of 6.00 x 10^11 Bq. What is it's half-life?
Atomic and Nuclear Physics
Which of the fuel conditions is not necessary to operate a self-sustained controlled fusion reactor?
(A) the fuel must be at a sufficiently high temperature
(B) the fuel must be radioactive
(C) the fuel must be at a sufficiently high density.
(D) the fuel must be confined for a sufficently long period of time.
(A) the fuel must be at a sufficiently high temperature
(B) the fuel must be radioactive
(C) the fuel must be at a sufficiently high density.
(D) the fuel must be confined for a sufficently long period of time.
Atomic and Nuclear Physics
Two samples of the same radioactive nuclide are prepared. Sample G hadms twice the initial activity of sample H. How does the half-life of G compare with the half-life of H?
(A) it is two times larger than that of G
(B) it is thev same as that of G
(C) it is half of that of G
(D) it is larger than that of G 4 times.
(A) it is two times larger than that of G
(B) it is thev same as that of G
(C) it is half of that of G
(D) it is larger than that of G 4 times.
Atomic and Nuclear Physics
Using the information on atomic masses given below, show that a nucleus of uranium 238 can disintegrate with the emission of an alpha particle according to the reaction (238_92U) → (234_90Th) + (4_2He). Calculate
(a) the total energy released in the disintegration
(b) the kinetic energy of the alpha particle, the nucleus being at rest before disintegration. Mass of (238_92U) = 23812492 a.m.u. Mass of (234_90Th) = 23411650 a.m.u. Mass of (4_2He) = 400387 a.m.u where 1 a.m.u is equivalent to 930 MeV.
(a) the total energy released in the disintegration
(b) the kinetic energy of the alpha particle, the nucleus being at rest before disintegration. Mass of (238_92U) = 23812492 a.m.u. Mass of (234_90Th) = 23411650 a.m.u. Mass of (4_2He) = 400387 a.m.u where 1 a.m.u is equivalent to 930 MeV.
Atomic and Nuclear Physics
Explain the meaning of:
(i) radioactive isotope
(ii) half-life
(iii) alpha-particles beta particles and gamma rays
(i) radioactive isotope
(ii) half-life
(iii) alpha-particles beta particles and gamma rays
Atomic and Nuclear Physics
Calculate the period of a sound wave that sustains an intensity of 67w / m2 at an amplitude of 12m considering that its velocity is 34m / s and a fluid density of 89kg / m3.
Atomic and Nuclear Physics
The period T of a simple pendulum is assumed to be affected by the following quantities.1 mass of bulb m 2 length of pendulum l 3 acceleration due to gravity g
if the empirical formula for the period T is T =Kmlg .find the relationship between T and the products of these two quantities using dimensional analysis
Atomic and Nuclear Physics
A plane mirror and a concave mirror of radius of curvature 60 cm are placed facing each other with a point object at the centre of them, if the image formed by first reflection at the spherical mirror and then at the plane mirror coincides with the object then the separation between two mirrors will be
