| Answer | Crossword Clue |
|---|---|
| ERNST | Physicist Mach |
| ERNST | Physicist Mach. |
| ERNST | Austrian physicist Mach |
| ERNST | Austrian physicist and philosopher Mach |
| ERNST | Physicist Mach or artist Max |
| ERNST | Physicist Mach of Mach number fame |
| ERNST | Physicist Mach who lent his name to a measure of speed |
