How much does this luggage weigh?

He is hiding a secret.

He is an expert in aerodynamics.

Newtonian mechanics is one of the fundamental theories of physics.

He died from strychnine poisoning.

He is an expert in classical mechanics.

He is writing a thesis on celestial mechanics.

He said, 'Where there is a will, there is a way,' and faced the difficult situation.

He is majoring in quantum mechanics at university.

She likes to drink liqueur.