What is the speed of an alpha particle that accelerates from rest through the potential difference of 380. V? An alpha particle is the nucleus of helium atom, has a mass of 6.63 *10^27 kg and carries a positive charge of two elementary charges (2e)

When does a metropolitan area become a megalopolis?

Which of the following discoveries would be most likely to cause a scientific paradigm shift? a. the discovery of more rings around uranus b. the discovery of a new pathogenic virus transmitted by mosquitoes c. the discovery that a dormant volcano is showing signs of activity d. the discovery of a new species of salamander in the amazon rainforest e. the discovery that excess heat is radiating from the center of the earth and causing global climate change

Which sentences describes a cycle of dependency? a. aid harms the local economy creating the need for more aid.b. aid improves infrastructure and creates more wealth and more good infrastructure.c. aid programs become more reliable over time so people can depend on them.d. no answer is correct