He sent a message using Morse code.

My grandfather likes to repair old pendulum clocks.

Our computer network is protected by a powerful firewall.

He moved the object using the force.

He moved the object using the force.

Kokin Wakashū is the first imperial anthology of Japanese waka poetry.

Foucault's pendulum is used to prove the rotation of the earth.

Experiments with the Foucault pendulum help to understand important parts of physics.

He is writing a paper on coding theory.

A matrimonial quarrel is one of the factors that disturb the peace of the home.