Secção sem título Um eclipse total da Lua ocorre... (seleciona a opção correta)
5 pontos
...sempre que, em fase de lua nova, a Terra passa na zona de sombra projetada pela
Lua;
...sempre que, em fase de lua cheia, a Lua passa na zona de sombra projetada pela
Terra;
sempre que é lua cheia;
sempre que é lua nova, porque a Lua não se vê,​

Consider the nuclear equation below. 239/94 pu—-> x+ 4/2 he. what is x?

Which statement best describes the flow of energy in this scenario

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.