A student lives 12 miles from school. If the student rode the bus to school and back, what is the student's total distance traveled and displacement. (First number is for total distance traveled and the second number is for displacement.) A. 12 miles and 0 miles B. 24 miles and 12 miles C. 0 miles and 24 miles D. 24 miles and 0 miles​

D

Explanation:

It is because the distance from home to school is 12miles and the bus to school and back is 12miles which is 24miles.

i wanna say it’s between b and d, leaning more towards b.

answer: the correct answer is 1.

explanation: there are various process in which a radioactive nuclei decays:

1) alpha decay: in this process, a heavier nuclei decays into lighter nuclei by releasing alpha particle. the mass number is reduced by 4 units.

2) electron capture: in this decay process, a parent nuclei absorbs an electron and gets converted into a neutron. simply, a proton and an electron combines together to form a neutron. mass number does not change in this process.

3) gamma ray emission: it is a decay process in which an unstable nuclei gives excess energy by a spontaneous electromagnetic process. this decay releases . this process does not change the mass number.

4) positron emission: it is a type of decay process, in which a proton gets converted to neutron and an electron neutrino. this is also known as -decay. in this the mass number remains same.

from the above information, we see that only alpha-decay is producing a change in the mass number of the nucleus.