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One of the components of Einstein’s equation WSJ Crossword Clue

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Frequently Asked Questions About This Clue

One of the components of Einstein’s equation
The most common and recent 4-letter answer for "One of the components of Einstein’s equation" is MASS.
Einstein's famous equation, E=mc², relates energy (E) to mass (m) and the speed of light squared (c²). The term 'mass' is one of the key components of this equation, representing the amount of matter in an object.
This clue was last seen in the WSJ Crossword on October 21, 2026.
Mass is the amount of matter in an object, typically measured in kilograms or grams.
The "m" in many a physics equation, "m," to scientists, Christmas Eve service, the "M" in BMI, Its base unit is the kilogram

The clue “One of the components of Einstein’s equation” is a classic crossword staple, frequently appearing in puzzles like the WSJ crossword. For the puzzle dated October 21 2026, the definitive 4-letter answer is: MASS.

Expert Tip: When you’re stuck, try to analyze the structure of the clue itself. Is it a direct definition, a pun, a fill-in-the-blank, or a pop culture reference? Identifying the type of clue you’re dealing with is a key skill for improving your solving speed.