Japan first atomic bomb dropped

A great deal was learned from the atomic bomb survivors. The US military dropped the first atomic bomb on Hiroshima, Japan on 6 August 1945 and a second on Nagasaki, Japan, three days later. The bombs used two different types of radioactive material, 235U in the first bomb and 239Pu in the second. It is estimated that... 

The first atomic bomb was tested at an isolated desert location in New Mexico on July 16,1945. President Truman then issued an ultimatum to Japan that a powerful new weapon could soon be used against them. On August 8, a single atomic bomb destroyed the city of Hiroshima with over 80,000 casualties. On August 11, a second bomb was dropped on Nagasaki with a similar result. The Japanese leaders surrendered three days later. 

On August 6, 1945, after Japan refused to surrender nnconditionally, the first atomic bomb, named Little Boy, a U-based bomb, was dropped over Hiroshima, Japan. Three days later, Fat Man, a plutonium-based weapon, was dropped on Nagasaki. 

FIGURE21.16 shows a schematic diagram of the first atomic bomb used in warfare, the bomb dropped on Hiroshima, Japan, on August 6, 1945. To tri er a fission... 

In this atmosphere President Truman (Roosevelt had died a few months before the first atomic bomb was dropped on Japan) had no difficulty securing funding for research on an even more powerful weapon known as the Super, or hydrogen bomb. 

The first atomic bomb (only two have ever been used against humans) was dropped on the city of Hiroshima in Japan on August 6, 1945. The bomb detonated... 

Because of the tremendous amount of energy released in a fission chain reaction, the military implications of nuclear reactions were immediately realized. The first atomic bomb was dropped on Hiroshima, Japan, on August 6,1945. 

The discoveiy of radiation has had many impacts on our society. It ultimately led to the Manhattan Project, the construction and detonation of the first atomic bomb in 1945. For the first time, in a veiy tangible way, society could see the effects of the power that science had given to it (8.5, 8.6). Yet science itself did not drop the bomb on Japan, it was the people of the United States who did that, and the question remains-how do we use the power that technology can give Since then, our society has struggled with the ethical implications of certain scientific discoveries. For the past decade, nuclear weapons have been disarmed at the rate of 2000 bombs per year. Today, we live in an age when the threat of nuclear annihilation is less severe. 

The world s first atomic bomb was dropped on Hiroshima, in Japan, in August 1945. It probably contained altout 10 kilograms of uranium. It killed 80 000 people within a day, and 60 000 more died within a year. Nowadays, some countries possess bombs that are 5000 times more powerful ... 

Einstein s letter convinced Roosevelt, and in 1941 he assembled the resources to begin the costliest scientific project ever attempted. The top-secret endeavor was called the Manhattan Project and its main goal was to build an atomic bomb before the Germans did. The project was led by physicist J. R. Oppenheimer (1904-1967) at a high-security research facility in Los Alamos, New Mexico. Eour years later, on July 16,1945, the world s first nuclear weapon was successfully detonated at a test site in New Mexico. The first atomic bomb exploded with a force equivalent to 18,000 tons of dynamite. Ironically, the Germans—who had not made a successful nuclear bomb— had already been defeated by this time. Instead, the United States used the atomic bomb on Japan. One bomb was dropped on Hiroshima and a second bomb was dropped on Nagasaki. Together, the bombs killed approximately 200,000 people and led to Japan s surrender. 

First atomic bomb, "Little Boy," dropped on Hiroshima, Japan. 

The potential of nuclear fission was first realized in the atomic bomb. In 1945, the United States dropped two bombs of unprecedented power, one on Hiroshima and the other on Nagasaki, Japan. Both were fission weapons. 

Bohr s proposal to enlist the Soviet Union in discussions before the atomic bomb became a reality here slips to the question of whether or not to tell the Soviets the bare facts after the first bomb had been tested but before the second was dropped on Japan. Byrnes thought the answer to that question might depend on how quickly the USSR could duplicate the American accomplishment. The Interim Committee s recording secretary, 2nd Lieutenant R. Gordon Ameson, remembered after the war of this confrontation that Mr. Byrnes felt that this point was a very important one. The veteran of House and Senate cloakrooms was at least as concerned as Henry Stimson to extract a quid pro quo for any exchange of information, as Conant s next comment to Bush demonstrates ... 

The success of the Trinity test meant that a second type of atomic bomb could be readied for use against Japan. In addition to the uranium gun model, which was not tested prior to being used in combat, the plutonium implosion device detonated at Trinity now figured in American Far Eastern strategy. In the end Little Boy, the untested uranium bomb, was dropped first at Hiroshima on August 6, 1945, while the plutonium weapon Fat Man followed three days later at Nagasaki on August 9. 

In early August 1945, the United States dropped two atomic bombs on Japan, destroying the cities of Hiroshima and Nagasaki. In Hiroshima, it was estimated that 45,000 people died on the first day and a further 19,000 during the subsequent 4 months. In Nagasaki, 22,000 people died on the first day and another 17,000 within 4 months. These remain the only use of nuclear weapons for warfare in history. The Japanese government finally surrendered on 15 August 1945. 

Here for the first time, in rich, human, political, and scientific detail, is the complete story of how the bomb was developed, from the turn-of-the-century discovery of the vast energy locked inside the atom to the dropping of the first bombs on Japan. 

On August 6, 1945, the United States became the first nation to use a nuclear weapon in combat. This bomb used a tubular configuration. Approximately 70,000 inhabitants of Hiroshima, Japan, were killed in the explosion an equal number were seriously injured. A few days later a second bomb, with a spherical configuration, was dropped on the city of Nagasaki. The casualty figures were similar, and World War II came to an end. The Nagasaki bomb was made of plntoninm, an artificial fissionable material produced in atomic piles by breeding reactions. 

---