HP Forum Archive 21

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HP Prime: Conversion factors Message #1 Posted by Paul Townsend (UK) on 26 Aug 2013, 3:14 p.m. Can one tell a Prime that a gallon is 4.54 litres not 3.785 liters?

Re: HP Prime: Conversion factors Message #2 Posted by Matt Agajanian on 26 Aug 2013, 3:19 p.m., in response to message #1 by Paul Townsend (UK) Hi there. If the Prime follows the same functionality as the 48 Series, you could create a user-defined unit of measurement.

Re: HP Prime: Conversion factors Message #3 Posted by Olivier De Smet on 26 Aug 2013, 4:00 p.m., in response to message #2 by Matt Agajanian The prime is a US product so it use the US gallon, not the imperial one ;)

Re: HP Prime: Conversion factors Message #4 Posted by Steve Simpkin on 26 Aug 2013, 3:59 p.m., in response to message #1 by Paul Townsend (UK) Ah.... The prime is assuming a US gallon (3.785411784 L) instead of a UK gallon (4.546092 L) as opposed to a Canadian gallon (4.54609 L). The HP-48 series supported all three "gallon" conversions.

Re: HP Prime: Conversion factors Message #5 Posted by Gilles Carpentier on 26 Aug 2013, 4:36 p.m., in response to message #4 by Steve Simpkin Perhaps it's time to use liters ;) By the way the Prime knows galUS and galUK (and OzUK,ptUK) but I did'nt see canadian gallon.There 23 units of volumes on the Prime Edited: 26 Aug 2013, 4:37 p.m.

Re: HP Prime: Conversion factors Message #6 Posted by Steve Simpkin on 26 Aug 2013, 6:06 p.m., in response to message #5 by Gilles Carpentier Quote: Perhaps it's time to use liters ;) I was in school in the U.S. during the mid 1970's and I remember us preparing in earnest to convert to the metric system. It never happened. I think the whole effort can be best summed up by a comedian who said: "We tried the Metric system for a day and it didn't work out.". As a side note, I am still waiting for the flying cars we were promised would be coming "soon" after the 60's. I'm still a little bitter about that broken promise.

Re: HP Prime: Conversion factors Message #7 Posted by Don Shepherd on 26 Aug 2013, 10:21 p.m., in response to message #6 by Steve Simpkin Quote: I am still waiting for the flying cars we were promised would be coming "soon" after the 60's Well, they are "coming soon". Reserve yours now.

Re: HP Prime: Conversion factors Message #8 Posted by LHH on 26 Aug 2013, 11:48 p.m., in response to message #7 by Don Shepherd I remember seeing them on the cover of Popular Mechanics when I was about 10. I was so enthralled with the idea I began making plans to build one myself, basically a car with fans on all four corners blowing down for lifting force. I had big plans to use rotating louvers on the bottom of each fan for horizontal movement, steering, etc. Luckily I spent most of my time designing the upholstery pattern for the seat and never got to the point of attaching four lawnmower motors to a frame, adding some propellers and trying to lift off. One of several fortuitous procrastinations that prevented me from leaving this party prematurely. I sure spent a lot of time at school daydreaming about flying around in that thing though!

Re: HP Prime: Conversion factors Message #9 Posted by Steve Simpkin on 27 Aug 2013, 12:15 a.m., in response to message #7 by Don Shepherd Thanks for the link, Don. On second thought I totally forgot about what I see on my daily commute on the Los Angeles freeways. I changed my mind. I don't want anybody to have flying cars :(

Re: HP Prime: Conversion factors Message #10 Posted by Don Shepherd on 27 Aug 2013, 8:13 a.m., in response to message #9 by Steve Simpkin I suspect that's the real reason that it hasn't happened yet! :)

Re: HP Prime: Conversion factors Message #11 Posted by LMMT on 27 Aug 2013, 4:33 a.m., in response to message #6 by Steve Simpkin And what about the video telephone by the turn of the century? Pick up the phone, dial a number and your relative 5000 miles away appears on a TV screen with a perfect view and no delays. In 2013, we are still dealing with 4G and the tiny mobile phones with those jerky videos... What a lie!

Re: HP Prime: Conversion factors Message #12 Posted by Walter B on 27 Aug 2013, 5:12 a.m., in response to message #11 by LMMT Hmmh, ever heard of Skype? d:-)

Re: HP Prime: Conversion factors Message #13 Posted by Paul Dale on 26 Aug 2013, 6:49 p.m., in response to message #4 by Steve Simpkin Where did these three gallons come from? The NIST volume conversions site only lists two. Neither match the value for your UK gallon. However, the conversion for the Canadian and UK gallon is tagged exact (bold) however. - Pauli

Re: HP Prime: Conversion factors Message #14 Posted by Steve Simpkin on 26 Aug 2013, 9:33 p.m., in response to message #13 by Paul Dale They came from converting the three different gallon units to liters using the built-in units on my HP-48SX.

Re: HP Prime: Conversion factors Message #15 Posted by Ken Shaw on 3 Sept 2013, 12:22 p.m., in response to message #4 by Steve Simpkin There is no liquid measure called "Canadian gallon". Canada uses Imperial gallons. Edited: 3 Sept 2013, 12:23 p.m.

Re: HP Prime: Conversion factors Message #16 Posted by Steve Simpkin on 3 Sept 2013, 3:22 p.m., in response to message #15 by Ken Shaw True, however Canada adopted the "Standard Imperial Gallon" at 4.54609 litre in 1964. The UK continued to use the "Imperial" gallon at 4.546092 litre until 1985 when they adopted the Canadian convention.

Re: HP Prime: Conversion factors Message #17 Posted by hugh steers on 26 Aug 2013, 4:19 p.m., in response to message #1 by Paul Townsend (UK) conversion calculator

Re: HP Prime: Conversion factors Message #18 Posted by BruceH on 26 Aug 2013, 5:08 p.m., in response to message #1 by Paul Townsend (UK) Quote: Can one tell a Prime that a gallon is 4.54 litres not 3.785 liters? Just installed emulator version "Pre-Release 1". The command CONVERT(1_galUK,1_l) gives 4.54609_l [Edit] PS: If what you meant was "can one redefine 1_gal to be 4.54_l" then no, as this would break programs provided by others. Edited: 26 Aug 2013, 5:11 p.m.

Re: HP Prime: Conversion factors Message #19 Posted by John B. Smitherman on 26 Aug 2013, 6:40 p.m., in response to message #18 by BruceH So, this explains why gasoline (petrol) is so expensive in the UK - your gallons are bigger. ;-) John

Re: HP Prime: Conversion factors Message #20 Posted by Nigel J Dowrick on 27 Aug 2013, 9:19 a.m., in response to message #19 by John B. Smitherman ...and why US fuel consumption figures are so poor! Nigel (UK)

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