On the average, a neutron loses 63% of its energy in a collision with a hydrogen

Q: On the average, a neutron loses 63% of its energy in a collision with a hydrogen

a) 2*(1-0.63)^n = 0.01 n = 5.3289 of collisions b) 2*(1-0.11)^n = 0.01 n = 45.465 of collisions

ID: 2124473 • Letter: O

Question

On the average, a neutron loses 63% of its energy in a collision with a hydrogen atom and 11% of its energy in a collision with a carbon atom. (a) Calculate the number of collisions needed to reduce the energy of a neutron from 2 MeV to 0.01 eV if the  neutron collides with hydrogen atoms.   ___________# of collisions

(b) Calculate the number of collisions needed to reduce the energy of a neutron from 2 MeV to 0.01 eV if the  neutron collides with carbon atoms. ___________# of collisions (a) Calculate the number of collisions needed to reduce the energy of a neutron from 2 MeV to 0.01 eV if the  neutron collides with hydrogen atoms.   ___________# of collisions

(b) Calculate the number of collisions needed to reduce the energy of a neutron from 2 MeV to 0.01 eV if the  neutron collides with carbon atoms. ___________# of collisions

Explanation / Answer

2*(1-0.63)^n = 0.01

n = 5.3289 of collisions

2*(1-0.11)^n = 0.01

n = 45.465 of collisions

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On the average, a neutron loses 63% of its energy in a collision with a hydrogen

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