Explanation:
The Phanerozoic eon is separated into three eras: the Paleozoic, Mesozoic, and Cenozoic eras
Covering many South African river basins, the 'Working for Wetlands' programme operates in all major catchments.
<span>So far the programme has been active in about 15 river basins, including the upper reaches of tributaries of the Limpopo, Tugela, Vaal, Nkomati, Oliphants, and Usutu Rivers. They have also been working on smaller river systems such as Berg, Umzimvubu, Black Umfolozi, Krom, Kouga, Blood, Breede, and Sand Rivers. Though this isn't the full answer, this might give you some insight on where the some of the projects are being ran.</span>
The elements listed in the choices are radioactive materials. These materials are very unstable because of the high neutron-to-proton ratio in the nucleus. Because of this, they spontaneously undergo nuclear reactions by giving off sub-particles in order to lower the ratio. They emit radiation in the form of alpha, beta or gamma.
Half-life is the length of time it needs to completely react half of the original amount. For example, it would take Bismuth 60.5 seconds to use up half of its amount. Therefore, the lower the half-life the faster the reaction is and the lesser the residual amount will be. With that being said, the answer would be Bismuth because it only takes seconds.
All of the above I believe
Answer:
1 kg
Explanation:
Because if it's precise to the ones place, then it would be 1.0 kg. So the corundum would weigh 1 kg. and your just moving the 10 over one to the right so the dot is now between 1 and 0 making it 1.0.
I really hope this helps you, if it's the wrong answer please tell me, If it's the right answer please tell me to let me know.
