The other scientists would mock and criticize him. Accuse him of being an American hold-out.
The answer would be different
Another scientist would have to 'discover' it again. For example, say I invented a flying car, but kept the special rocket fuel formula a secret. Someone else would look at my work and be able to figure it out, or they would do trial-and-error to figure it out.
The units grams would be a good choice.
The study of physics, and indeed of any science, is thoroughly dependent on accurate and repeatable measurements. These measurements must be repeatable not only by one scientist on many occasions, but also my many scientists. In order for this to happen, for measurements to be repeatable, all the scientists must be using accurately standardized units of measure. Imagine what would happen if my meter and your meter were different, so that when I say one meter it is equal to your 99 centimeters? Answer: we really couldn't do any science because our measurements would not be repeatable. This is not to say that everybody has to use the same units. I can measure in inches while you measure in meters, as long as my inch is always equal to 0.0254 of your meters. But if either my inches or your meters vary from this then we are both out of luck.
50 units
nothing
we would die
you would blow up
You would die
what would happen if the 8th amendment didn't exist
you die
?
plants will die
Death.
we have freedom
Nothing would happen. You either believe in them or you don't!
There will die