Ethan throws a water balloon into the air, planning to catch it on his nose like a seal. But at the last second, he chickens out and leaps to the side, shouting "Look out!" as the water balloon was in flight for 5.0 seconds. Let up be the positive direction and give the sign its acceleration vector and its velocity vector a) as the balloon leaves Ethan's hand
b) after 2.0 seconds
c) after 2.5 seconds
d) as it lands at 5.0 seconds

answer: electrons

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.

d. platinum would have the greatest temperature increase because it has the lowest specific heat.