Ammaniya

Yes, 10 AU is correct!

Einstein's equations remain valid. --- Is there an error in Einstein's theories? Could curving space and time be impossible? Some argue that it is equivalent to striving to empty something. Nothing can move at the speed of light. Excessive curvature in space requires a lot of energy. This could imply that black holes do not arise easily. Perhaps Einstein's math was imperfect. However, science is constantly verifying these assumptions. It's hard to say for sure right now. New ideas are constantly being investigated!

I think you might be looking for something like a "reactor vessel" or "chemical reaction chamber." It’s a bit niche, so maybe try looking into lab glassware or DIY science setups. What kind of liquid and metals are you working with?

Haha, I guess your calculations seem generally correct! Just a comment: when mixing tartaric acid with sodium and potassium hydroxides, ensure the pH is carefully monitored. It's crucial for proper Rochelle salt formation. I'm quite surprised by how straightforward the process can be! Good luck!