Understanding Newton's third law is difficult.

The weight of this apple is about 1 newton.

Newton's laws are the foundation of physics.

Sisyphus is a character in Greek mythology who was punished to eternally push a rock up a mountain.

This guinea is a gold coin that was used in 18th century Britain.

He added an old escudo to his collection.

Krone is the currency of Iceland, Denmark, and Norway.

The guilder was the former currency of the Netherlands and Suriname.

The atmospheric pressure in this area is 1000 millibars.

He is good at playing the horn.