Today you are going to be practicing making predictions using the formulas we have talked about in class so far. Lets talk about the formula for momentum [p = mv]. Lets say you watched a man run and knew the mass ( m )and the velocity (V) of the man and
then calculated the momentum and your answer was p. The man then iTuns for a second time and his mass stays the same (m)
but this time his velocity was twice as fast ( 2V). What is his new momentum after the 2nd run?

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.

choosing tennis and golf balls is your inde choice.

their mass and volume are dep