Answer:
3 m/s
Explanation:
Average Speed = 
Plug in the numbers, it will be (6m + 3m) divided by (2s + 1s), which is 9m/3s, which equals to 3m/s.
Answer:
(A.)Nuclear fission and beta decay (electron emission)
The velocity of the mass after 9 second is 88 m/s
It will sink because it is heavier. The density of water 1.00 g/ml
Answer:
neutrons protons electrons
Explanation:
after the Big Bang, the universe was filled with neutrons, protons, electrons, anti-electrons, photons and neutrinos.