# Dale's Recent Activity

1. ### Dale liked Ibix's post in the thread I Inertial reference.

No. A photon is not a frame. Assuming that you actually mean to talk about an inertial reference frame moving at the speed of light,...

Feb 15, 2019 at 8:22 PM
2. ### Dale replied to the thread I Gamma in Brans-Dicke framework.

Research India Publications is a known predatory publisher. I would be highly skeptical of anything found only in one of their...

Feb 15, 2019 at 2:42 PM
3. ### Dale replied to the thread I Gamma in Brans-Dicke framework.

Please cite the study also

Feb 15, 2019 at 1:24 PM
4. ### Dale replied to the thread B General Relativity as a Challenge for Physics Education.

Awesome! Congratulations, it is always great to get community recognition for your work like that

Feb 15, 2019 at 10:08 AM
5. ### Dale replied to the thread I The integral of energy?.

No worries. You just have to keep in mind what the equations mean and not just juggle symbols around. The integral of E wrt time is...

Feb 14, 2019 at 8:23 AM
6. ### Dale replied to the thread I The integral of energy?.

The E above is the electric field, not the energy.

Feb 14, 2019 at 6:40 AM
7. ### Dale replied to the thread I I have question about Maxwell's 2nd equation.

As @Orodruin mentioned the $\nabla$ is correct, not $\Delta$. You can easily verify this at:...

Feb 13, 2019 at 9:40 AM
8. ### Dale replied to the thread I Example of a theory that was right after 20 years of failures?.

Possibly, but it doesn't seem that way to me. He is not "sampling" the theories and including the duration to success as a measurement,...

Feb 13, 2019 at 9:34 AM
9. ### Dale replied to the thread Revolution under the influence of a central force.

You are right. There is a separate formula for retrograde rotation, which gives positive days. But I would rather use one formula with...

Feb 13, 2019 at 6:31 AM
10. ### Dale replied to the thread Revolution under the influence of a central force.

If $N_{sidereal}=0$ then $N_{solar}=-1$ meaning that the sun rises in the west and sets in the east once per year. The formula...

Feb 13, 2019 at 6:26 AM
11. ### Dale replied to the thread Revolution under the influence of a central force.

It is still a little unclear what variables you want in this formula, but here is a simple one that might be what you are looking for:...

Feb 12, 2019 at 9:30 PM
12. ### Dale liked Elquery's post in the thread B Is it dangerous to touch neutral wire?.

I know this is old, and the OP is probably long gone, but for others finding this thread... here's my crack at it: If you have a...

Feb 12, 2019 at 4:26 PM