9. A 1.00 kg mass is placed at the free end of a compressed spring. The force constant of
the spring is 115 N/m. The spring has been compressed 0.200 m from it neutral position.
It is now released. Neglecting the mass of the spring and assuming that the mass is
sliding on a frictionless surface, how fast will the mass move as it passes the neutral
position of the spring?

c. convergent boundary.

explanation:

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.

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible