Recent content by sphoenixee

I'm not an expert, but I thought your problem was interesting and had some free time, so I tried it. here's what I got. #1----------------------- Each location is either contaminated or not and there are 6, so 2^6=64 #2------------------------ No contamination particles=0.6*.8*.85*.9*.95*.9 This...

Your answer looks right. I'd say the super trustworthy internet is wrong ;). (Disclaimer: I'm getting back into calc after a year of none, but still I'm quite sure you're correct).

The best form of government...mmmmmm. I wonder if there is an answer to that. If there is, then why are not all governments the same form? Thus, I don't think there is. Furthermore, as stated by others, it's important to consider for whom and by whom the government is. For example, a group of 20...

Question: what is the range for propeller efficiency for plastic toy propellers?

I chose choice 2. New knowledge is great, but unless you know how to apply it and practice with it, you're going to forget it. My favorite encounters with math are through high school math contests, and in this arena at least, practice>>>>knowledge. I'd say that 2 years ago I knew most of the...

Calculators are super useful for arithmetic jobs, solving higher order polynomials, matrices (anyone up for inverting 4x4 XD), statistics definitely, calculus somewhat and of course, graphing. In terms of 83+, it is mildly useful for calc. Sort of a bummer there's no indefinite integral (no...

To convert from rectangular (x,y) to polar (r,theta): r=Sqrt[x^2+y^2] theta=arctan(y/x), after which you must consider the given quadrant See wikipedia: http://en.wikipedia.org/wiki/Polar_coordinate_system#Converting_between_polar_and_Cartesian_coordinates If you get an irrational answer...

I'm a youngster now? You got an elixir? (Now, that'd make you rich...) I was being a bit harsh, yes, and my humblest apologies for that. I do appreciate and highly value your insightful comments. Nevertheless, I still don't appreciate ridiculing of my project or discussion of completely...

I realize that many of you think this is a joke, but please realize that my project does involve far more than ornithopter flight. It's just that I had a question specifically about this part and wanted some input. So, if you don't have anything related or helpful to say, then please don't waste...

The radiometer does rotate reverse if you put it in a refrigerator. This is because the black sides cool off faster than the silver sides. I don't know what you mean by the latest theory of thermal transpiration, but thermal transpiration has been used to explain Crookes Radiometer ever since...

Many many thanks to all for the posts. I'll be sure to share my experiences when I'm done. sphoenixee

Random question: How much does a regular beer bottle (12 fl oz) weigh? I'm doing a physics project involving the weight of beer bottles, and I don't have a scale, balance, etc. :rolleyes:

Why does the mass of the pulley not matter? The pulley is also being accelerated at the same rate as the rest of the system, so if one wants to apply F=ma, then one needs the mass of the pulley in addition to the mass of the two masses. My bad about the acceleration = 4g. I meant that the...

andrevh, how does that do anything? So what, I use m3 and m4 and T3 and T4 instead of m1 and m2 and T1 and T2. I could've told you that when I was 7 for crying out loud. I really do appreciate any efforts at helping, but changing the names of variables is quite useless...or am I missing...

Homework Statement A hanging 4 kg mass is connected by a weightless cord on a pulley to a 3 kg mass which rests on a smooth surface. The pulley has frictionless axle and I=.5kgm^2 and r=.3m. The cord does not slip on the pulley. Find the acceleration of the two masses and the tensions of the...