How have the barriers to migration changed over time?

What acceleration is produced when a 3,000-n force acts on a 1,200-kg car? ignore the friction

Religious conflict in northern ireland started with a) cultural differences resulting from viking invasions around 800 b) england’s split from the catholic church in the 1500s c) rebellions in ireland between 1916 and 1921 d) the norman invasion of england in 1066

In a command economy, the majority of goods and services are provided by the