1. lf a bar magnet's neutral region is broken into two, what will most likely occur? a. the segment that's longer will have a north and south pole. b. neither segment will have a north or south pole. c. one segment will have only a north pole, the other segment will have only a south pole. d. each of the two segments of the original bar magnet will have a north and south pole. student b incorrectreference4. a transmission system at a radio station uses alan to convert a direct current into a high-frequency alternating current. a. oscillatorb. demodulatorc. transmitting antennad. modulatorstudent d incorrectreference i need

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.