Final answer:
Hachiya may have thought a 500-ton bomb fell on Hiroshima due to the unprecedented destruction caused by the atomic bomb, without realizing the actual power and nature of the bomb dropped.
Step-by-step explanation:
Hachiya may think that a five-hundred-ton bomb has fallen on Hiroshima due to the immense destruction and power of the blast from the atomic bomb known as "Little Boy." The actual bomb, rather than being a conventional 500-ton bomb, was an atomic bomb with a yield equivalent to approximately 15 kilotons of TNT which was significantly more powerful than any conventional explosives. This atomic bomb not only caused immediate devastation but also led to long-term effects due to radiation exposure.
When the atomic bomb was dropped on Hiroshima at 8:15 a.m. on August 6, 1945, the city was instantaneously leveled. About 80,000 people were killed during the initial blast with the death toll climbing to approximately 140,000 due to subsequent radiation poisoning and injuries. Considering that the largest bomb used previously in warfare, the British Grand Slam, had a blast power of less than a thousand tons of TNT, the destruction caused by the atomic bomb dropped on catastrophic power of the bomb involved.