Ratios Definition and 224 Threads

Well I am getting into how engines work and am trying to learn. I was wondering if there is a formula I can follow to find out how much more pressure is applied on the piston end towards the cylinder walls if the rod ratio is steeper. I want to compare a 1.59 Rod Ratio (347 cubic inch) to...

Hi! What can be said about the intensity ratios of characteristic X-rays (Kalpha to Kbeta ) originating from a X-ray tube? I mean roughly and in general, not for some very specific anode material. I first thought that K-L (Kalpha) transitions would be more likely to happen than K-M:s...

How do I calculate partial transition rates W if I know the Branching Ratios of the different modes? :confused:

Can I use molar ratios for gasses, solids, and aqueous solutions all in one equation? For instance: Mg(s) + 2 HCL(aq) -> MgCl2(aq) + H2(g) Can I say that if i had 2 moles of Mg I would have 2 moles of H2. Does this trick have anything to do with Amedeo Avogadro?

According to GR as well as Maxwell's theory, when charged particles are accelerated they radiate energy by electromagnetic and gravitational radiation. This energy, according to special relativity, is equivalent to mass. I wonder, how can elementary particles preserve their fixed e/m ratios...

Hi, My Question: Problem 1. The expected phenotypic ratios for each of the crosses below is 1:1. Determine whether the observed ratios are differ significantly (p < 0.05) from the expected. I used a Chi Square test to help me determine that answer and found the there is no probability of...

Hi! I have a supposedly simple question. Two people are splitting 500 bucks between them. First it will be split in a 3/5 ratio. Wouldn't the answer just be that one them gets 200 and the other gets 300? I think so. So, following this last thought, if it is to be split in a 2/3 ratio...

Hi , is anyone studying gear ratios?? i need some help with calculating the final gear drive.. i've calculated it at 94.97:1 is this correct??

Hi, Here's the question: a) There is a radio telescope that is 1000 feet in diameter. It is claimed that it can detect a signal that lays down on the entire surface of the Earth a power of only one picowatt. What power would be incident on the antenna in this case? It seems to me that...

The "Law of Multiple proportions" states that if two elements combine in different ways to form different substances, the mass ratios are small, whole number multiples of each other. Suppose that you have 66g of carbon combined with oxygen in carbon dioxide (CO2), how many grams of oxygen would...

This is a question from the MCAT, test 3R, and I am stumped as to why the answer is what it is. "A mass is lifted from the ground to an altitude h1, requiring work W1. The work to lift an identical mass to height h2 is W2. If h2 is twice h1, what is the ratio of W2 to W1? Assume force due...

I've been trying to get the ratio of the french minute of 100 seconds and the standard minute 60 seconds. The textbook gives me answer of 0.084 and I can mess with these numbers and eventually change 60 to 100 or vise versa. I tried google but they only do 1:4 type of ratios and the textbook...

Ok here's a fairly simple question (I hope) i know that with different gear ratios you can trade off torque for speed, (ie. big to small = lower torque higher speed, small to big = higher torque lower speed) but what happens to the force applied to the original gear? is it a constant throughout...

I've been told that there are useful interpretations of the ratios of moments of probability density distributions, such as <x^4>/<x^2>. I only have un-normalised values of the second and higher moments of the distribution of interest. Is there any way of quantifying the spatial extent of the...

Can someone get me started? This is a homework question that I just can't get started on. No wonder it's a "challenge" question. A car is traveling at 100km/hr. A) What is the angular speed of a tire which has a radius of 36cm. B) Through how many radians will the tire turn in 30s at...

Base 10 Anomaly An applied 49-year study into the origin of pi and the Base 10 number system resulted in the finding of a highly anomalous formula. Essentially, the finding derives from the perfect ratios (0:1:1:2:3:4) given by Pythagoras who we know studied and perhaps taught in the...

This one had three bullets by it so it's a pretty tough one. Work and rambling thoughts so far... please tell me if I'm wrong. This would be a change in entropy problem for the first couple of ratios right? (delta)S=Sfinal-Sinitial=nRln(Vf/Vi)+nCvln(Tf/Ti) yet it is an adiabatic operation...

Howcome the ratio of the surface area of spheres are not equal to the ratio of volume of spheres? For example if I had two spheres, with an aspect ratio of 1:4 when comparing surface areas, yet I have 1:8 between those same spheres when comparing volume. This doesn't make sense to me...

Is there any reason why an electron is 1084(I think that's right) times smaller than the mass of a neutron. is there any mathematical or "physical" reason why this works for atoms and if so what would be the consequences of a proton having half that mass but with the same ratio to an electron or...

The ratio of electric fields, E1/E2, at the surfaces of ions when H+ is the first ion (q=+1 and R=0.00001 Angstrom) and K+ is the second ion (Q=+1 and R=1.33 Angstrom) is: how would u solve this kind of problem? well i know that the ratio of E1/E2 is qR^2/Qr^2 so do i just plug in those...

All you tech geeks out there, aren't you sick and tired of all the different aspect ratios for viewing images and movies? I for one am. They adopted the 4:3 standard when film was first invented. They used it for TVs and movies. They used this ratio for decades. Then someone came along and...

I really need some help with this question. Until now this is the first question I have ever seen like this and I am getting marked on it. here it is: Two racing cars of masses M1 and M2 are moving in circles of radii R1 and R2. Their speeds are such that they each make a complete circle in...

“wave radius” used for spherical wave patterns, same as wave length. “Wave density” same as wave frequency. Gamma wave 1e-11 wavelength multiplied by 3e19 frequency rquals total mass Total “energy” of gamma wave = 2e-14 Radio wave length 1e-1, multiplied by 3e9 frequency equals total...

okay, i was a little bored so i computed the current thread to post ration for all the forums above this one. the one with the highest ration is Philosophy, averaging out at aprox. 33.24 posts per thread! (that's including religion as a subforum) and in last place we have Mathamatics...