7. A neutron at rest decays (breaks apart) into a proton and an electron. Energy is released in the decay, in the form of kinetic energy of the proton and electron. The mass of a proton is 1836 times the mass of an electron. What fraction of the total energy released goes into the kinetic energy of the proton?

The fraction of the total energy goes into kinetic energy of proton is

Explanation:

Given:

Mass of proton

Mass of electron kg

Here neutron at rest decays into proton and electron

     ⇄

Where energy released

The value of this reaction is given by

Where kinetic energy of reaction

Here we need to find fraction of the total energy released goes into the kinetic energy of the proton

Therefore, the fraction of the total energy goes into kinetic energy of proton is

answer: at 24 february, 2014 the population gets twice of its initial population.

explanation:

since we have given that

the population for alpha city, t years after january 1, 2004 is given as

first we find out the initial population, i.e. t=0,

so, our quadratic equation becomes,

according to question, we have said that if the population has twice its initial population, then it becomes

so, time taken to reach this above mentioned population is given by

now, we know that time can't be negative so, we take t=9.149 years.

hence, at 24 february, 2014 the population gets twice of its initial population.

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).