Question

Two Questions Worth 14 points(Gradpoint)

1. Pu-239 has a half-life of _____.

240 years
24 years
24,000 years
2,400 years
2. Nuclear fusion has not yet been harnessed as an energy source because _____.

sufficient pressure cannot be generated
lasers are too dangerous
of a lack of deuterium
the energy is hard to control

Answer 1

1. Pu-239 has a half-life of _____.
24,100 years
2. Nuclear fusion has not yet been harnessed as an energy source because _____.
a.sufficient pressure cannot be generated