Scale Definition and 721 Threads

In post #55 of the A&C reference sticky there's a link to the February WS-2004 symposium on Quantum Gravity Phenomenology http://ws2004.ift.uni.wroc.pl/html.html this is about the predictions coming out of Quantum Gravity and ongoing or planned opportunities to test. what I have to...

Third scale QG that Smolin and others are working on attempts to incorporate 3 invariant scales (the speed c, the Planck mass kappa, and the length L = Lambda-1/2) and to have 3SR---triply special relativity---as its flat limit. this research direction has been attracting more people lately...

hey all... Im having trouble with a question here that asks when only 2 forces act on an object (1: 8.0 to the right, 2: 12.0 N to the left) draw a scale diagram to determine the magnitude and direction of the resulting NET force. anyone know how to do this? anyone know how to draw a...

Hi all, I was wondering if anyone of you has read the book of Laurent Nottale Fractal Space-Time and Microphysics: Towards a Theory of Scale Relativity why is not his approach adopted ?- as apparently, he extended the principle of relativity to scales and thus proposes a unifying...

Anyone have some ideas about how to build a scale model of a trebuchet?

This paper : Hyperbolic Universes with a Horned Topology and the CMB Anisotropy http://arxiv.org/astro-ph/0403597 ...press release: http://www.newscientist.com/news/news.jsp?id=ns99994879 proposes a universe with the shape of a horn. This is a hyperbolic space with negative...

I need help on this problem: Suppose you stand on a bathroom scale on one of the Earth's poles, and it reads 700.0 N. If you stand on the same scale on the Earth's equator, and your mass is unchanged, what will be the scale reading on the equator? (Remember that the scale tells you the normal...

What is the most commonly used scale of sharpness? Does anyone know a webpage with examples of the comparitive sharpness of various things?

We have a helicopter flying and use the power "P" to keep it in equilibrium. But if the scale was greater n times, what would be the power to keep it there?

Why the Kelvin termo scale has no negative values? I'm just asking if some one knows and is it ok and why.

Thermal physics question... A wire resistance thermometer is constructed with material that has a resistance that varies as temperature as below. R=R0 (1+ alphaT + betaT^2) where constants alpha and beta are 3.8 x 10^-3 k^-1 and -3.0 x 10^-6 k^-2 respectively. Calculate the...

Let's present a scale of frequencies of light. For initial we’ll take frequency of visible light. Here particle / wave duality is shown fifty- fifty. At increase or decrease of frequency this proportion is broken. Frequency increasing. Properties of a particle...

Please help me with the following 4 questions if you can (I want to double check my answers)... 1. A 24.5 kg child sits on a bathroom scale which is placed on the seat of a swing. What does the scale read when the swing is at rest? The child begins to swing back and forth until she reaches a...

For those of you familiar with numerical modelling of various phenomena, you will know about work like the various discretisation schemes, stability/gradient limiters for high order schemes and so on. The most broad sweeping improvement to the field of numerical modelling would ultimately be...

I need help! I am practicing out of my book and this problem is killing me. Given the following equation, choose the best scale for the axes for x = 10, 20, and 30 y = 2x – 3 A) x-axis: from 0 to 80, intervals every 20; y-axis: from 0 to 40, intervals every 10. B)...

By whatever means that you may imagine, is this possible? I say yes.

How many points are there on the Beaufort scale for measuring wind force?

I have found references to a book that is either "to appear" or has already been published by Cambridge University Press. The book is Physics meets Philosophy at the Planck scale edited by C. Callender and N. Huggett this is apparently a collection of essays by philosophers and...

This is just to defer a discussion that began in the Religion forum concerning https://www.physicsforums.com/showthread.php?s=&threadid=429&perpage=15&pagenumber=3". It seems there are two approaches: the seven note diatonic scale, i.e., do, re, mi, fa, so, la, ti, do, developed by Guido...

On a scale from 0 to 10 what does A equal to ? And B, C,... ? (I mean grades...at school)

This question has been troubling me... : A physics teacher decides to use bathroom scales (calibrated in Newtons) in an elevator. The scales provide a measure of the force with which they push up on the teacher. When the lift is stationary the reading on the bathroom scales is 823 N. What...