A66.2 kg ice skater moving to the right with a velocity of 2.47 m/s throws a 0.136 kg snowball to the right with a velocity of 31.4 m/s relative to the ground. what is the velocity of the ice skater after throwing the snowball? disregard the friction between the skates and the ice.

v = 2.41 m/s

Explanation:

Here net force on the Skater + snowball is zero

so here we can use momentum conservation for skater + snowball

now we have

so the final speed of skater will be 2.41 m/s

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.

a is the best answer your welcome