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49 posts tagged with math *and* physics.

Displaying 1 through 49 of 49. Subscribe:

## In lieu of quals...

I'm currently in the first year of a PhD program in physics. Right now I am just taking classes. My school does not have a qualifying exam, and there's not much I need to do outside of my classwork. However, I don't want to live from homework to homework -- so I'd like to set aside some extra time for textbook-reading and problem-solving. Have you done this? Tell me about your experience. [more inside]

## Did I sell myself short?

I'm currently in the very very early research stages of making a career change and I'm starting to think that I sold myself short in regards to my education. I have a Bachelor of Arts in History and, well, I've really been struggling to find "my place" in the career world for the last 5 years. I'm starting to think I sold myself short by not pursuing more math/science related careers. Is it too late for me to maybe find a career in STEM I would enjoy? [more inside]

## How to self-study science from textbooks like a boss?

I'm an (older) grad student doing research in applied physics. I've ticked all my class requirements but have a shortlist of subjects I feel would be useful to my research and my career. I've translated these into a list of reputable, recommended textbooks to read.
I've started reading those, usually in the evenings after all daily tasks are complete, and I enjoy it very much - but does anyone have tips to maximize the payoff of those reading hours? [more inside]

## The Mathematics Of Time

So I have a few years to kill and I'd like to spend them fully understanding what physicists and mathematicians know about time. I'm not looking for any sort of summary, I want to understand the math from the bottom up. I once caught my father going through the

*Annus Mirabilis*papers with a red pen; that's the sort of proficiency I have in mind. [more inside]## Probability distributions and their practical applications

I am looking for a resource that lists probability distributions and their common real-world applications. For example, I'd expect to see: Lognormal - daily returns in the stock market. Poisson - failure rates for mechanical equipment, ... [more inside]

## Giant numbers (Ex: how many primes are smaller than the largest known?)

Many sites say that the largest known prime is "2^57,885,161 − 1, a number with 17,425,170 digits." Given this and well known research about the density of primes, I think it's at least possible to estimate the number of primes between 1 and 2^57,885,161 − 1. But I don't know how to do this myself.
I really want the answer to this one (the order of magnitude at least), but I've got lots of these, and I'd ideally like more cool ones. :) [more inside]

## Netherlands Master's in education vs teaching experience in Asia, which?

I have a B.Sc in computer science and have one year of experience English using my CELTA qualification. Looking around, I see a lot of requests for people with North American B.Sc's to teach Math/Physics/CS in Asia. I'm trying to decide whether to go and start teaching, or whether it is better to get a state teaching qualification (2yr) in the Netherlands first... [more inside]

## Narrowing my son's grad school search

My son is a junior physics/math major at a small midwestern state university. He needs to start looking at graduate programs. He would prefer to stay in research or academia. How can I help him start this process? (B.S. for me) Location is not an issue. It's more a question of what programs offer the best opportunities and fields of study. How can we find out that kind of information? How can I help him start with a reasonable number of candidates?

## extrapolating temp/energy use difference from small boxes to my condo

Physics geeks! Help me save energy! How do I estimate how much less energy will be used by light siding vs gray siding, based on an experiment with small boxes? I made some identical boxes, put them in the sun, measured temperatures, and am trying to figure out how to scale up. The net has info about different roof colors, but not siding colors. [more inside]

## I was banned from collegeconfidential just for asking for some help?

Summer vacations are coming up and I am going to use some of my free time to learn physics and math, subjects that I love. In order to do that i asked collegeconfidential.com if anyone had "exclusive study materials" from their university which they could share. I mentioned that I would like to have acess to tests and exams from other universities and I could give some good materials collected by my colleagues of the physics and math course in exchange. [more inside]

## 150 to around 120, which bpm is best for pitch?

I have a song at 150 bpm, perfectly in tune. I want to repitch it down to around 120 by slowing it down. At which bpms will the notes be at pitch?

## How do I go from one kind of nerd to another?

What steps should I take to switch to the aerospace industry from the academic world? [more inside]

## How to pronounce an equation in English.

Please help me pronounce this formula related to projectile motion as it would be spoken out loud: L = v0^2 sin2θ / g [more inside]

## How can I relearn high school subjects?

I want to relearn algebra, chemistry, basic mechanics, and basic physics this summer. For free? [more inside]

## Math/Physics Question: Stability of an abruptly stopped object

If you have an object with a given base length and a given CG height, how fast can it travel before you have to worry about it running over an obstacle and falling over? [more inside]

## How do I learn to be an effective tutor?

If I know the material that I'm teaching well, but don't have any experience with tutoring or teaching, how do I learn the skills and techniques that will help me be an effective tutor? [more inside]

## Direct line to Stephen Hawking

Where can I find someone willing to help me do

*relatively*simple (ha!) relativistic time dilation calculations? [more inside]## How fat DOES a man have to be to stop a runaway trolley?

How fat DOES a man have to be to stop a runaway trolley?
Check my math/physics please. [more inside]

## Why should "e" exist?

Why is the number "e" so... [more inside]

## Physical Mathematics?

Is there a book that teaches math via physics? [more inside]

## .....wat?

I'd really love a detailed explanation of the terms and humor in this math / science related XKCD cartoon. [more inside]

## What was this geometric creature builder website?

Several years ago, I saw a website with a fun little flash or javascript applet thingy where you could build little tensegrity structure creatures, then have oscillating movements applied to the pieces, so that the structures would seem to "walk". I don't remember what it was called! From memory, one of the simpler structures looked sort of like this. What was it? Is it still online? [more inside]

## Lengthening your horizons.

How close is the horizon on the moon? On Mercury? On Mars? [more inside]

## How to find focal length from image magnification % ?

Math/Optics: How can I derive the focal length of a lens from the magnification percentage of an image? [more inside]

## Should I pursue my interest and study college physics more?

Should I pursue my interest and study college physics more? Specifically, should I take a year-long calculus-based program, until I get comfortable that I'm on top of it-- and can really judge my level of interest and aptitude fairly?
Considering I'm a Junior English major. Also considering that it's been 15 years since HS algebra and I've never been good at math. But I want to be. [more inside]

## Tell me everything there is to know about waves.

I'm interested in learning everything there is to know about waves. Sound waves, ocean waves, light waves, electromagnetic waves, waves in math, in economics, brain waves, etc, etc.... [more inside]

## Biographies of abstract thinkers wanted

Looking for biographies of scientists or mathematicians. [more inside]

## What's higher level statistics like?

Math-related career advice requested: is work in higher level statistics compatible with an imaginative-type thinker or would it be total hell? [more inside]

## Why doesn't tire pressure vary with vehicle payload (much)?

Stupid physics question: tire pressure. [more inside]

## Linguistic study of math/physics equation "language"

I was thinking the other day about "all Greek to me!" as I was reading a physics book w/equations (using the Greek symbols)
And equations are a sort of language, of course.
So I wondered if there's some sort of linguist who's ever looked at the grammar or syntax of math/physics equations and tried to derive, whatever the hell it is linguists derive!
Does this sound like something anyone has heard of? If so, have any links?

## The twenty most important numbers

In a talk (at TED) by Brian Greene on string theory he says that there are "there appear to be about 20 numbers that really describe our universe..." He lists a few in his talk, but what are the rest of of those numbers? [more inside]

## Bill Nye should be a Mefite.

What are some simple experiments that help explain complicated phenomena? [more inside]

## Is it too late to become an amateur physicist?

Is it too late for me to get into physics? [more inside]

## Can I learn quantum mechanics?

I'm reading Quantum: a Guide for the Perplexed and I'm enjoying the graphics, history and simplification of the math and science used to explain quantum mechanics. But I'm reasonably well versed in math and science - I took a year of college physics, linear algebra, and diff eq about ten years ago. Is there any chance of me learning to understand the equations and papers of Planck and Einstein that are the basis of QM? Are there any good books that could help walk someone like me through this stuff? Or am I stuck as a layperson unless I earn a degree in math or physics?

## Math basics need be strengthening

In need of some daily source of random math problems (upto basic calculus) that will reinforce or (if necessary) re-establish some real fundamental concepts in the algebra portions of calculus, unless something else might work. [more inside]

## The relation between temperature, ballistics and sonic booms

Need to get a double-check on some extracurricular science number crunching. A friend and I were wondering about how much effect cold temperatures would have on the speed of sound, and I had the idea to see if some handgun calibers could go from subsonic to supersonic at reasonably cold temperatures. After some extensive calculations, I think I have a pretty good set of numbers, but I want to make sure I'm not wrong. [more inside]

## How long can you tread water?

If everyone in the world got in the ocean at the same time, how much would sea levels rise? [more inside]

## Math for pre-schoolers

My cousin's four year old son is obsessed with things like quarks and infinity. He insists to his mother that infinity is the last number. She isn't so sure, and wants to know more about things like strangeness.
I don't want to determine this kid's future, but it seems fun to feed his curiosity. And since my wife's babysitter was Murray Gell-Mann, the responsibility has fallen partially on my shoulders to help answer his questions. What kinds of information can you recommend that I give to his mother so that she, an attorney and not a mathematician, and her son can learn more about this information. In particular, what kinds of books, games, and projects would introduce him to other neat ideas in mathematics and physics?

## Help a first-time tutor get started!

FirstTimeTutorFilter: I'm plan to start tutoring Math, Chemistry, Physics and possibly ESL in January. Only problem is, I have *no idea what I'm doing*. Anyone have any textbooks, general teaching books, online certification courses, etc to recommend? [more inside]

## Fizzix

I want to start teaching myself physics, but how? [more inside]

## Two spheres colliding

Help me with the math of two spheres colliding [more inside]

## To doublemajor or not to doublemajor?

I'm a math major, but dont know exactly what I want to do. Should I also major in Physics? Economics? [more inside]

## Equal and Opposite Reaction?

Physics: Difference between two people pulling on each end of a rope, and one person pulling on a rope tied to a tree. [more inside]

## Can I determine the speed of a car from its skidmarks?

A speeding driver just about rear-ended my delivery truck. I know how long her skidmarks are. Can I determine how fast she was driving? [more inside]

## Calculus resources for the curious?

I would like to relearn some calculus on my own. Please recommend the best book for the purpose. [more inside]

## Intractable math / physics puzzle: Light in a perfectly mirrorred sphere.

You are suspended in a large, hollow sphere. The inside of the sphere is perfectly mirrored. There is nothing else in the sphere, and all you carry is a flashlight. You turn the flashlight on. What do you see? [more inside]

## How are we different from patterns in data?

What are some good writings on the relationship between what we think of as the physical world and the world of mathematical abstractions (the space in which, for example, all possible sequences exist) ? [more inside]

## death comes in threes, science works in twos...?

When reading a book about Newton V's Leibniz recently, it occurred to me that great advances in Science often seem to occur in tandem, ie two unrelated persons or groups often arrive at a breakthrough at roughly the same time. Is this true? Can anyone think of some other examples? Can anyone explain why this may be the case?

## State of Quantum Physics

I'd like to read a readable, yet not dumbed-down account of the current state of quantum physics, addressing the famous paradoxes and directions modern research is taking. Any recommendations? [more inside] [more inside]

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