Misc: What is the name of the instrument that is used for measuring skin temperature?

Questions

What is the only day named for a planet?

What is the only digit that has the same number of letters as its value?

What is the only dog to have a barb on each individual hair follicle?

What is the only english word that ends in the letters 'mt'?

What is the only n.y.c borough that is not on an island?