If you are asking specifically about the two bombs dropped on Japan in WW2, they were fuzed for airburst, so they did not hit the ground. Both exploded between 1500 ft & 2000 ft altitude. Airburst was selected to maximize blast & thermal flash damage effects area.
The time it took for the atomic bomb to hit the ground varied depending on the altitude at which it was detonated. In the case of the atomic bomb dropped on Hiroshima, it took approximately 43 seconds to reach the ground after being released from the plane at an altitude of about 31,000 feet (9,400 meters).
The atomic bomb was tested at the Trinity site in Alamogordo, New Mexico in 1945.
The Manhattan Project, the effort to create the atomic bombs during World War II, began in 1939 and concluded in 1945 when the bombs were dropped on Hiroshima and Nagasaki. It took approximately six years to develop and produce the atomic bombs.
An atomic bomb does not explode immediately because the triggering mechanism needs to initiate the chain reaction by compressing the fissile material, such as uranium or plutonium, to a critical mass. This process typically involves precise timing and coordination to ensure maximum impact.
The aftermath of a nuclear bomb explosion can last for years, depending on the size of the bomb and the radiation released. The immediate blast impact and thermal effects would be over in seconds to minutes, but the long-term effects, such as radiation contamination and environmental damage, could persist for decades. Recovery and cleanup efforts would take a significant amount of time and resources.
Once an atomic bomb is detonated, the fission chain reaction occurs almost instantaneously, resulting in a rapid release of energy in a matter of microseconds. The entire explosion process, from detonation to complete energy release, happens within a fraction of a second.
See: Atomic bombings of Hiroshima and Nagasaki
The US were working on the bomb since 1941 up to 1945 when the first bomb tested.
atomic bomb that's what
The first atomic bomb was launched in 1945, by the US. It incinerated Hiroshima and Nagasaki, Japan during WWII The above is half true. That was the first time an atomic bomb was used in war, but the first atomic bomb was detonated at the the Trinity Site in White Sands Missile Range, on July 16, 1945.
decades
It takes less than a minute.
See: Atomic bombings of Hiroshima and Nagasaki
yes
in russia in 2007
The atomic bomb was tested at the Trinity site in Alamogordo, New Mexico in 1945.
It didn't take 1 day to make the atomic bomb, it took most of WW2 for the US to create it with testings.
I can't tell if you're trying to make a joke or not. There were no "sticks of dynamite" used in the atomic bomb.