None - the lightbulb has the capacity for its own revolution
If it's their lightbulb, none of your damn business.
None, he lets the knives do the work
Replace the nails with screws.
I'd be surprised if you could fit two in there
RPM (Revolutions Per Minute)
None. Each lightbulb contains the means of its own revolution.
Dark matter has the capacity to leave an impact on a system