Hello everyone, I was wondering if anyone could help solve my problem... ...How much time in seconds (or milleseconds) would light travel in 1ft? (assuming that it was traveling in a vacuum.) I spent 2 and a half hours yesterday trying to solve this problem, but without much luck. I remember back in school, I would know how to do this kind of stuff, but now...well, you know. If anyone knows the answer to this problem (and if possible, a formula), I would much apreciate it.
How much time to cover 300,000,000 meters (that's about 1,000,000,000 ft)? So, how much time to cover 1 ft?
That would be a good homework question, what is planck's constant in the furlong/firkin/fortnight system.
Mines a trick question. In planck units c=1, hbar=1 and G=1. Yours is harder. What's the mass unit in the firkin system? Stones, right?
Using dimensional analysis, h is in Joule-seconds or kg*(m/s)^2*s = kg*m^2/s Although http://en.wikipedia.org/wiki/FFF_System says that firkin is a mass, according to http://en.wikipedia.org/wiki/Firkin and google, firkin is a volume: http://www.google.com/search?q=firkin+in+m^3 . However, since it is used with water (whose density is about 1000 kg/m^3), we have an expression for the mass in kg of a firkin of water http://www.google.com/search?q=kg+in+firkin*(1000+kg/m^3) So, since google has a problem with numerical constants in the unit conversion, http://www.google.com/search?q=h/1000+in+(firkin)*(kg/m^3)*furlong^2/fortnight h / 1 000 = 4.8405995 × 10-34 (firkin * (kg / (m^3)) * (furlong^2)) / fortnight or h = 4.8405995 × 10^(-34) (firkin of water) * (furlong^2) / fortnight (FYI: http://www.google.com/search?q=c+in+furlongs+per+fortnight yields the speed of light = 1.8026175 × 10^12 furlongs per fortnight)
Well done, although a traditionalist would say that mass should be a firkin of ale not water! Some interesting units I hadn't heard of here http://en.wikipedia.org/wiki/List_of_strange_units_of_measurement