A radioactive nuclide has a half life of 3.0 days. If 2.0 kilograms of the sample remains unchanged after 9.0 days what was the initial mass of the sample

C6irc68rd6rid5rucr5u i6i iyf yif ify iyf ify yfi itf yfi yfi icy yfi yci yci iyc iyf iyf

Hi; /c

Firstly, the water in the dams hold gravitational potential energy as they are above ground level. the gravitational potential energy is then transferred to kinetic energy as it falls, spinning the turbinethe turbine then spins the generator, which is a large magnet surrounded by metal coils. by doing this, the generator generates electricity. in this action, the energy transfer taken place is kinetic to electric energy