Solids Definition and 313 Threads

matlab & solids of revolution?? Does anyone know if MATLAB can graph solids of revolution by just using the information contained in the integral form of the problem? :confused:

The base of the solid is the disc x2+y2=1. The cross-section by planes perpendicular to the y-axis between y=-1 and y=1 are isosceles right triangles with 1 leg in the disc. Find the volume of the solid. I did the problem, but I am not sure if I did it correctly, and if I did I really just...

Rutherford's idea that atoms are mostly empty space is retained in all subsequent atomic theories. So, how can solids be solids? How can a chair support you, why don't you fall through. Is it because the atoms are so close together??

I took Honors Chemistry this year with the assumption I might actually get some good questions answered, but alas, no such luck. When we went over different stages of matter, the teacher used those little diagrams I'm sure you've all seen to describe how solids, liquids and gasses differ. The...

Recently I took an introductory course on Group Theory applied to chemistry, and learned about symmetry applied to molecular vibrations and how to detemine the detection of the vibrational nodes in IR and Raman Spectroscopy. My interest is to be able to use Infrared spectroscopy to...

I have three questions about sound waves. I could have asked my physics teacher but he fails to answer almost all the question out of our syllabus. :mad: 1- We have read that the speed of sound in solids doesn't depend on their desities. If that's the case then they depend on what thing...

Ok. I just need someone to explain the methods for me, if it's not too much trouble. I know you have the shell method, disk method, and washer method. I am taking AP Caclulus BC in high school. I want to know if all of these methods are useful of if one of them is more important. Thanks...

I'm attempting to find the volume of the solid obtained by rotating the region under the curve: e^{-x^2} Bounded by y = 0, x = 0, and x = 1. I've done quite a few of these problems before, however, none of them have involved an exponential. If I recall correctly e^{x^2} cannot be...

i've tried searching but I'm not sure of the proper name for these things... interested in 'holographic' displays but without the normal glass or anything. i was thinking maybe there is an invention that uses lasers and/or interference to produce light/whatever. do you know? thx

Most children, play with toy telephones by connecting two plastic cups with a long string. When the string is pulled tightly, sound is transmitted from one cup to the other. How does that thing work? (I 'm used to play with it but I ignored that fact). Another one... doctors use...

Hi folks and happy new year, As usual i have been leafing through some old physics books and have stumbled across something that has confused me, wonder if you can help. Having looked at a 'classical' graph of interatomic potential energy against distance within a solid and how it relates to...

Hello again! I'm not sure if this is difficult but I believe that everyone have experienced this... I can't explain it... =) Sorry about that. Anyway, here's my problem... At noon, when the sand in the beach is already hot, why does the water still feel cold? Early in the night...

Some of the problems, I really don't know how to even set up the problem. I don't want an answer for them, but I need an idea where to start. 1. Gauge pressure in both tires = 690 kPa. Bike and the riders mass = 90.0 kg. Find area of contact of each tire with the ground if each tire...