What problems would be caused if you issued an unnecessary hurricane warning

How many countries have portuguese as a national language?

An earthquake’s epicenter can be determined from arrival time data recorded on a(

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.