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.
Alamogordo, New Mexico
The US was capable of producing 3 atomic bombs a month at the end of WW2. This would suggest it took a bit over a week to make each bomb kit. However it isn't that simple, the 3 bomb per month bottleneck was the Hanford plutonium production reactors: each of the 3 reactors could make 1 bomb worth (6.2 kg) of plutonium a month and they ran in parallel.
A timer controlling when neutrons willl be lanuched and absorbed by the atom bomb...therefore contolling when a critical mass will be reached and when a nuclear raection will take place leading up to the explosion. <22> The nator geniuzzz <22>
It can take anywhere from just a few seconds, to several minutes, if the funnel cloud reaches the ground at all.
1.56 seconds
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
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.
See the related link 'Atomic bombings of Hiroshima and Nagasaki' below.