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Question1
An atomic nucleus of mass 230 u moving at 400 m/s emits an alpha particle of mass 4.0 u in direction of its velocity. If the remaining nucleus slows to 325 m/s, what speed does alpha particle have when it is emitted?
Question2
The proton-proton chain efficiently converts hydrogen into helium according to 4H →4 He. A Helium 4 nucleus weighs 6.64638 × 10-27 kg and a Hydrogen nucleus (a proton) weighs 1.67262 × 10-27 kg. Work out alteration in mass when 1 kg of Hydrogen is converted completely into Helium 4. Convert change in mass per kg into energy created, Joules per kg of Hydrogen, using Einstein's formula. E = mc2
A sphere of radius R is uniformly charged to a total charge of Q. It is made to spin about an axis that passes through its center with an angular speed ω. Find the magnitude of the resulting magnetic field at the center of the sphere.
A resistor is in the shape of a cube, with each side of resistance R . Find the equivalent resistance between any two of its adjacent corners.
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