An 8-mev neutron is inelastically scattered from a barium nucleus. what is the average energy of the emergent inelastic neutrons?

7.45 Mev

Explanation:

in this case we need to considerated the following formula

alpha = E/Eo

where:

alpha = (A - 1)square /(A + 1)square

and A is the mass number of nucleus , for this case the Ba is 56

so we replace the values

alpha = (56 - 1)square /(56+ 1)square

alpha = 55²/57²

E = 8×55×55/57×57

E = 7.45 Mev

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

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in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.