Kind of number represented by the equation M = v/c Crossword Clue

• ___ 1 (speed of sound)

  New York Times · Monday, December 1, 2025 · 4 letters

• Scientist whose "number" is a dimensionless ratio

  New York Times · Friday, June 27, 2025 · 4 letters

• Supersonic speed number

  New York Times · Monday, January 6, 2025 · 4 letters

• Physicist Ernst

  New York Times · Monday, December 25, 2023 · 4 letters

• Ernst who studied sonic booms

  New York Times · Wednesday, March 29, 2023 · 4 letters

• Speed of sound

  New York Times · Saturday, January 22, 2022 · 4 letters

• It's calculated relative to the speed of sound

  New York Times · Friday, August 27, 2021 · 4 letters

• Speed measure

  New York Times · Thursday, February 20, 2020 · 4 letters

• South American landmark whose name means "old peak"

  New York Times · Thursday, May 16, 2019 · 4 letters

• Eponymous physicist Ernst

  New York Times · Wednesday, March 13, 2019 · 4 letters

More clues from this crossword

• 24-Across Gunty who wrote "The Rabbit Hutch," winner of the 2022 National Book Award for Fiction
• 25-Across Reunion attendee
• 25-Down Bothers
• 26-Across You might sleep on it
• 26-Down Excel function
• 27-Across Industry that emerged in the 1970s
• 29-Across Flip
• 29-Down Honor roll, e.g.
• 30-Across Windy flight?
• 30-Down A "whole" thing
• 31-Down "Being slightly ___ is like being slightly pregnant — it tends to get worse": Molly Ivins
• 32-Down Battleship corner