The black masses gathered in the square for a protest.

Relativistic masses can be calculated using the formula E=mc^2.

The Planck masses in the universe are incredibly small.

The church holds solemn masses every Sunday.

The church held votive masses every Sunday.

The thermal masses in the building help regulate the temperature.

The wet masses were left to dry in the sun.

The dry masses of the plants were measured and recorded.

The molar masses of the elements vary widely.

The tyrannies of the masses can lead to oppressive and unjust policies.