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Find the energy released in the alpha decay
238
92 U →234
90 T h +
4
2 He.
Sodium is a monovalent metal having a density of 0.971 g/cm3 and a molar
mass of 23.0 g/mol. Use this information to calculate (i) the density of charge
carriers and (ii) the Fermi energy of sodium.
In a nuclear reactor, a very slow-moving neutron is absorbed by a stationary boron atom. The equation for the nuclear reaction is
The mass of carbon in an animal bone fragment found in an archaeological site is 200g. If the bone registers an activity of 16 decays/s, what is its age?
Calculate the magnitude of the orbital magnetic field experienced by a 2p-electron in hydrogen
Calculate the magnetic flux density B at the centre of a hydrogen atom for the 1s 2S1/2 level and
also for 2s 2S1/2.
If Z1 =5i-2j
Z2= 3i+3j
Z3=4i-j,
Show that Z1,Z2 and Z3 are associative, commutative and distributive.
Write down the ground state configuration for protons and neutrons and determine the spin and parity of 17O8(oxygen) nucleus using the shell model.
A 112 kg man stands 551 m from a building of 25,500 kg. What is the gravitational force of the man due to the building? What is the gravitational force of the building due to the man?
Two 2.5 kg bowling balls are 0.50 m apart. What is the force of gravity of the first bowling ball due to the second? Compare this to the force of gravity on the second bowling ball due to the first.
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