A 40 kg box is placed on a 2 m tall shelf. What is the gravitational potential energy of the box?

By the end of the 1800s, there was a change in the nature of the immigrants coming to the united states. immigration from northern europe—england, ireland, germany, and scandinavia—declined, while immigration from italy, russia, and austria-hungary grew. in fact, between 1900 and 1910, more than three-fourths of all immigrants came from these three countries. unfortunately, these countries were far removed england, the home of our founders, and the immigrants who came from them had a hard time adjusting to life in their new country.

When was wheeled traffic permitted in early rome? daytime nighttime all day never

What are new social classes emerged due to advancement in agriculture ?