How did einstein created the theory of relativity?

The chinese exclusion act was the first significant law restricting immigration into the united states. why do you think the us government singled out chinese immigrants in particular for exclusion?

What was the role of the samurai in japan before imperialism?

How does smith characterize the colonizing effort and why does he so characterize the effort to settle jamestown? what was the most difficult challenge faced by the colonists who established jamestown? how was this most difficult challenge affected by other demands and challenges that confronted the first english to establish a permanent settlement in north america?