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Atomic and Nuclear Physics
The degeneracy of spectral term 3F is
(A) 7 (B) 9
(C) 15 (D) 21
(A) 7 (B) 9
(C) 15 (D) 21
Atomic and Nuclear Physics
Sodium has a work function of 2.36eV. If a beam of monochromatic 442-nm light is incident upon a sample of sodium, will electrons be ejected? At what speed?
Atomic and Nuclear Physics
the transition J=0 to J=1 in a HCL molecule occurs at 10.08/cm. the rotational constant ?
Answer: 5.34
Answer: 5.34
Atomic and Nuclear Physics
The disintegration constant of ²³⁸U is 4.87×10⁻¹⁸s⁻¹. Calculate its half life(in years). Also calculate the number of disintegration per second from 1 gram of Uranium. It is given that Avogadro's number= 6.02×10²³
Atomic and Nuclear Physics
Define binding energy. Calculate the binding energy per nucleon of Fe. Given
( Fe) = 55.934932u, Mn= 1.008665u and Mp= 1.007825 u.
( Fe) = 55.934932u, Mn= 1.008665u and Mp= 1.007825 u.
Atomic and Nuclear Physics
Calculate the activity of K40 in 100kg man assuming that 0.35% of the body weight is potassium. The abundance of K40 is 0.012%, its half life is 1.31 109 years [ Avagadro number, N= 6.023 106] .
Atomic and Nuclear Physics
A gamma spectrometer delivers a 10ns pulse of 1Mw average power. If the photons have a wavelength of 694.3nm, how many are contained in the pulse
Atomic and Nuclear Physics
A star ending its life with a mass of twice the mass of the sun is expected to collapse combining its proton and electron to form a neutron star. If a star of mass 2.0× 1.99×1030kg collapsed into the neutron what would be its radius?
Atomic and Nuclear Physics
Calculate the time of free fall of an HI cloud of density 10^6
particles/m3
.
particles/m3
.
Atomic and Nuclear Physics
The lattice constant for KCl is 6.292 Å and the Young’s modulus in the [100] direction is 210Nm102.3−×. Calculate the force constant and the frequency at which electromagnetic radiation is strongly reflected by the KCl crystal. The atomic weights of K and Cl are 39 amu and 37 amu respectively.
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#339914 on Dec 2023
#339914 on Dec 2023