swansont

Study all the geology you want, it doesn't seem to have helped you at all with the physics. You need an external torque. Angular momentum is conserved without one. Um, "impact" = "external torque" References? All I can find is this which refers to the shifting as a "wild idea" and doesn't do anything to satisfatorally explain the mechanism. Everything I've read talks about torque from the sun, moon and planets causing changes (e.g. Milankovitch cycles) which change the obliquity a few degrees. Again, these are from external torques.

Technically your teacher should be using cos30 for that equation, since it's a dot product, but you get the same answer. Your coordinate system has to be consistent. Using the incline plane as the x-axis: In your first equation, the acceleration is g*sin60, so the equation should be t = u/(g*sin60) You shouldn't be using u*sin60 in the second equation, since the velocity in that direction is actually 60 m/s. The acceleration in that direction is -g*sin60, so that part is OK.

To make a bound system you have to get rid of energy - it doesn't take energy. To remove the moon from orbit would require energy input. If it were to somehow crash into the earth, energy would be released. To maintain an orbit requires no energy. The work done on an object moving in a circle is zero.

The cetripetal force is any force that acts on a body to make it move in uniform circular motion. It can be e.g. gravity, tension in a string or a magnetic force that does this. "centripetal" = "center-seeking"

In order to change the rotational axis, you MUST have an external torque. This is physics 101 stuff. There is no need to go any further. Your contention is nonsense, and it is laughable for you to use the phrase "ill informed" in referring to anybody else on this topic.

While it's true you need a conductive medium, you can have as much current as you want, but if the potential difference is below the threshold for separation, you won't get any gas. Put several ~1V batteries in parallel, and you won't see anything. Put them in series, and you get electrolysis.

You have to know the fission yield curve to get a more precise number, but U-233 and U-235 will be almost the same. And then average the change in binding energy. Pu isn't too much different - They're all right around 200 MeV per average fission. (One source I saw said U-233 is "somewhat less" than U-235, which is 205-210 on average. Another said "about 200.")

The capacity to do work.

You need to be more specific. You mean the idea that electrons and nucleus are separate, or that the orbits are not classical planetary orbits? The experiment that destroyed the J. J. Thompson "plum pudding" model of the atom was the Rutherford scattering experiment.

How would that have exerted a torque on the system? This is the rotational analogue of pulling one's self up by one's bootstraps. Angular momentum is conserved with no torque. The answer is "no."

A magnetic pole shift and a rotational axis shift are not the same thing.

Non sequitur. An acceleration doesn't cause a gravitational field to come into existence. GR doesn't say that an acceleration is a gravitational field, it just says the effects are indistinguishable.

Yes, you have to account for all of the effects - the gravitational potential of the earth and the sun, and the various speeds with respect to some coordinate system.

It's HW help. The point is to help the poster with the HW question, not to do it for them. The amount you learn by watching someone else work a problem is extremely limited.

But that's not the point.

It's the disruption of the air as you drive by.