4 Standard: 8.PS2.4 & 8.ETS1.1 A car manufacturer reduces the mass of a car by 250 kg. If the new design is otherwise identical to the old
design, how will the new car compare to the old car?
A It will have a greater gravitational attraction to the road.
B It will require more fuel to operate.
C It will need less force to move.
D It will release more gas emissions.
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found in the nucleus

has mass of one amu

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.

i don't understand is there any other way you can rephrase it plz let me know in the comments and i will do it.

explanation: