In a rectangular coordinate system, a positive point charge q = 6.50 nc is placed at the point x= 0.230 m , y=0, and an identical point charge is placed at x= -0.230 m , y=0. find the x and y components and the magnitude and direction of the electric field at the following points. a)
find the x and y components of the electric field at x= 0.230 m , y= -0.350 m . ex= , ey= n/c b)
find the magnitude of the electric field at x= 0.230 m , y= -0.350 m . e=/c c)
find the directiion of the electric field at x= 0.230 m , y= -0.350 m .
? = ? counterclockwise from the +x axis

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.