I thought of a question that might be fun to explore.

Lucid dreams were first demonstrated in the laboratory in the late 1970s in England and around 1980 in the US. The longest lucid dream recorded in a laboratory was about 1 hour.

From what little I know of physics, 1 hour should be long enough to measure the mass of an object.

So assume you have a group of physicists in a laboratory in a lucid dream. I don’t know if you’ve ever had a lucid dream, but it’s quite possible (thousands have reported it, including many who were hooked up in labs; I have experienced it many times over decades of lucid dream experience) to have a lucid dream which is virtually indistinguishable from the waking state.

If the physicists measured the mass of an object in a dream, is there anything that would NECESSARILY be different about the measurements than if they did so in the waking state?