The blast approaches the speed of sound in air a) power b) wind c) pressure d) shock 2. the fires are started by from the blast a) thermal energy b) a shock wave c) nuclear fusion d) gamma rays 3. the intensity of initial nuclear radiation with distance from the point of burst. a) depends b) does not change c) increases d decreases complete the sentences with a proper 1. south africa its nuclear arsenal before joining the npt 2, north korea another nuclear test. a) has conducted b) conducted c) conducts d) is conductin 3. next month talks on iran's nuclear program in vienna, austria. a) begins b) began c) have begun d) will begin 4. nowadays india steadily the size of its nuclear arsenal. a)increase b)will increase c)is increasing d)has increased

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