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HNQ
2:16 PM
2
Q: Is it theoretically possible to determine the age of the universe to a high precision?

BorisMy question is a bit abstract, but I'm wondering if it makes sense to expect/hope that one day we will be able to measure the age of the universe (in Earth's frame of reference) much more precisely, down to sub-year precision? Is that a well defined question and is it physically possible to figur...

 
 
4 hours later…
HNQ
6:30 PM
5
Q: What can go wrong with applying chain rule to angular velocity of circular motion?

zabop Lets say I have a circular motion, like this: I know that: $$\omega = \frac{\text{d} \phi}{\text{d}t}$$ Mathematically, what I am doing wrong, when I attempt to apply the chain rule in the following way? $$\omega = \frac{\text{d}\phi}{\text{d}t}=\frac{\text{d}r}{\text{d}t}\frac{\text{d}\phi}{\...

 

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