6. What was V-J Day? What caused this day to happened?

On August 15, 1945, news of the surrender was announced to the world. This sparked spontaneous celebrations over the final ending of World War II. On September 2, 1945, a formal surrender ceremony was held in Tokyo Bay aboard the USS Missouri. At the time, President Truman declared September 2 to be VJ Day.

Explanation:

On August 15, 1945, news of the surrender was announced to the world. This sparked spontaneous celebrations over the final ending of World War II. On September 2, 1945, a formal surrender ceremony was held in Tokyo Bay aboard the USS Missouri. At the time, President Truman declared September 2 to be VJ Day.

answer; i believe the two groups were irish immigrants and chinese immigrants;

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.