Direction: Rearrange the following six sentences (A), (B), (C), (D) and (E) in the proper sequence to form a meaningful paragraph and then answer the questions given below them.
A. Reaching temperatures many times those found in the sun’s core and pressures 300bn times those normally experienced on Earth, a wave of nuclear reactions ripped through the fusion fuel, releasing 3.15 MJ of fusion energy – 1.1 MJ more than was put in – overa few tens of nanoseconds.
B. And it’s not even exciting because of any new physics: fusion experts have long argued that you just need a hammer of a certain size to make the thing “go”, and NIF has obliged by upping the input laser energy considerably.
C. Now this is not exciting because of the absolute energy released — that was small, only enough to boil two or three kettles.
D. Researchers from NIF used the world’s most energetic laser to fire 2.05 megajoules (MJ) of energy into a millimetre-sized capsule of hydrogen fuel.
E. But this is exciting because it’s the first scientific proof that fusion can produce more energy out than is put in, also known as “net energy gain”.