Robert Oppenheimer

hydrogen bomb

What impact did the US development of the atomic bomb have on World War II? After the US dropped atomic bombs on two major cities in Japan, Japan surrendered. It provided supplies for the Allied war effort, not just the US effort.

President Truman authorized the use of the atom bombs in an effort to bring about Japan’s surrender in the Second World War. In the days following the bombings Japan surrendered. The Manhattan Project was the US government program during World War II that developed and built these first atomic bombs.

The Manhattan Project produced the first atomic bomb. Several lines of research were pursued simultaneously. Both electromagnetic and fusion methods of separating the fissionable uranium-235 from uranium-238 were explored at Oak Ridge in Tennessee.

Hiroshima was chosen because it had not been targeted during the US Air Force’s conventional bombing raids on Japan, and was therefore regarded as being a suitable place to test the effects of an atomic bomb. It was also an important military base.

Klaus Fuchs

Most uranium ore in the United States comes from deposits in sandstone, which tend to be of lower grade than those of Australia and Canada. Because of the lower grade, many uranium deposits in the United States became uneconomic when the price of uranium declined sharply in the late 1970s.

Uranium weighs 19.05 gram per cubic centimeter or 19 050 kilogram per cubic meter, i.e. density of uranium is equal to 19 050 kg/m³; at 25°C (77°F or 298.15K) at standard atmospheric pressure.

Uranium glass also fluoresces bright green under ultraviolet light and can register above background radiation on a sufficiently sensitive Geiger counter, although most pieces of uranium glass are considered to be harmless and only negligibly radioactive.

In reference to Uranium glass’ radioactivity, it should be noted that, while pieces from the late-19th and early-20th centuries were comprised of 2-25% uranium, the level of radioactivity is still negligible in the long run; people are exposed to radioactive materials every day and, while we wouldn’t recommend eating …

The answers from people who sell and collect depression glass is that it is safe; they mention uranium in some colors, arsenic in others…but it’s safe they say because it’s a tiny amount, it’s bound up in the matrix of the glass, and so forth.

Made by the Jeannette Glass Company from 1929 through 1933, this “Cube” pink Depression glass butter dish was inspired by the Cubist art movement. The dome is the most valuable part of the dish. The plate alone is often valued at around $9 while the two pieces together sell for around $40.

Depression glass is so called because collectors generally associate mass-produced glassware in pink, yellow, crystal, and green with the Great Depression in America.

All colored glass is depression glass. Only glass from the late 1920s to very early 1940s is depression glass. Arcoroc made this and some lovely blue glass in the 1970s, many years after the depression era. Arcoroc is a French company and marked their glass.

Lime-soda glass was used to make most of the pressed dinnerware items in depression glass patterns. The lead glass was used to make blown items like stemware and vases. Regardless of which type of glass was being made, arsenic was added to the glass formula.

Distinguishing Real from Reproduction Pieces. Look for tiny bubbles on the surface of the glass. Check the piece very closely, and look at it from all angles. If it is a real piece of depression glass, there will be a scattering of small bubbles.