Recent content by PAllen

I would say no change to the status of any inflation aimed at ‘explaining’ the standard model initial state, since the conclusion is to increase confidence in the standard model of cosmology.

A little off topic, but since I alluded to Faraday's long apprenticeship with Sir Humphrey Davy that acted as bridge from self teaching to actual research, an amusing quote from Davy is that when asked, late in life, what he thought his greatest discovery was, he said Michael Faraday.

Wrong. He did a long apprenticeship with Sir Humphrey Davy (president of the Royal Society, world famous chemist) before his work on EM. Also, the field was young and undeveloped compared to physics fields today. Wrong again. He graduated from a top physics school, and was working in a patent...

The problem is (mostly?) fixed now. Just tested it.

I’d never seen that one. At first glance, I like it. Now, I have dig in to determine whether I can believe it …

You, could, of course. I was trying to realize the notion of potential in contrast to surface gravity, as a function of position.

Thanks!

I gave you a single diagram showing that, including where there is 20 kg force.

Wait a minute - depends on whether the stationary car is able to roll, or how slippery the surface is. Extreme case: stationary car on ice starting at collision point. To whatever extent both cars move after collision, there is less damage in the stationary car case.

Well if you look at the crude diagram I posted some poste ago, you will see what balances the 20 kg.

I don't know if this will help or not, and I don't have any drawing software, so here is a free hand diagram:

The advantages of the old fashioned agate knife edge balance with weights. Good to one milligram easily. Tarnish on the weights was the enemy…

All the scenarios are the same, including the original. A string or spring under tension T means each element has a pair of Newtonian opposing forces on each end - right end of one element pulls with force T on left end of next, and left end of next pulls on right element of first. This state...

Just replace string with spring in the argument. If the spring moves freely, it measures 0. If held stationary, it measures the force - on either end - they must be equal.

The tension in the string is the result of one end fixed and the other end under force. The nature of the fixing of one end is irrelevant - whether it is a rocket, glue, or a knot. All three simply apply the force needed to prevent the string from moving.