Scientists conducted experiments with subcritical masses.

Scientists have discovered that when supercritical masses are reached, a nuclear chain reaction can occur.

The working masses play a crucial role in the economy.

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.