Misc: who wrote 'little lamb, who made thee'?

Questions

What kind of seeds can cause drug tests to trigger false positives for opium?

What large fish earned the nickname "cheetah of the sea" for its speed in the water?

What Mojave Desert city has a name meaning "the meadows" in spanish?

What portable device did James Spengler invent in 1907, using a soap box, pillow case, a fan & tape?

What river were the Joan of Arc's remains cast into?