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OT Fahrenheit

D

Default User

Jan 1, 1970
0
Goedjn said:
Stupid example, though. If you're going 100 MPH, a 500 mile
trip also takes five hours. If you're only using one set of
units, it doesn't make any difference what they are.

More practically, 60MPH is a mile a minute, and very easy to work with.



Brian
 
D

Default User

Jan 1, 1970
0
Dave said:
Yes, but then you have to divide by 60 to know how many hours
that work out to.

Is that a problem for most people? After all, the same time system is
used in most places.



Brian
 
S

Stephen B.

Jan 1, 1970
0
Yes, but then you have to divide by 60 to know how many hours
that work out to. 375 km at 100 kph is 3.75 hours. or 3 hours 45
minutes, while 375 mile requires division rather than just
sticking in a decimal point. 6 with a remainder of 15.

I am used to the metric system. When I am en route to a city and
see the destination signs and it says for example 122 km.....
that is 1.2 hours. ..... and I instantly know I am just over an
hour a way.

If you are 23 km away how long will it take to get there at 100 kph?
When I am 23 miles away I instantly know I am 23 min away @ 60mph

What ever happened to the dual unit traffic signs?
 
Yes, but then you have to divide by 60 to know how many hours
that work out to. 375 km at 100 kph is 3.75 hours. or 3 hours 45
minutes, while 375 mile requires division rather than just
sticking in a decimal point. 6 with a remainder of 15.

If we are going to make these things simple, why not use a digital
clock and calender. Now if we can just get the rotation of the earth
to be an even base 10 number, compared to it's circuit of the sun..
 
K

krw

Jan 1, 1970
0
It is snowing and 30 degrees out now so I just chunked another piece of
wood on the fire :)

That sucks! I had another nice day to work outside. It was a
glorious 62F here in NW Vermont. I think I got sunburnt though.
It's only supposed to be 50F tomorrow, but that's enough to finish
my stain and trim work.

It is time to get the wife's snow tires on though. ...or I'm going
to be driving her to work.
 
K

krw

Jan 1, 1970
0
WHAT?? The closest I said to that was that the light year is not a
metric unit.

You also implied that it was an English measurement.
I suppose you know a light year is NOT an amount of time.

Sure, I also know hat you're an idiot.

-
Keith
 
G

George E. Cawthon

Jan 1, 1970
0
Default said:
Dave Smith wrote:



I disagree, even though I have a science background (Physics). Metric
is great for doing that sort of thing, but for weather, not so much.

Fahrenheit is good because 100F is really nice and hot, and 0F is
really nice and cold. Bounds the temps that humans deal with rather
nicely. 100C is outside the range of experience (one hopes) and 0C is
coldish. Who cares what temperature water boils at?

The degrees F have nice granularity, so you don't have to deal with
fractional ones when describing the weather.

Granularity? You mean spacing? Doesn't matter my
electronic F deg thermometers measure in tenths
anyway.
 
S

Stephen B.

Jan 1, 1970
0
Harry K said:
23 minutes unless there is something wrong with my math. Now had you
said 23 miles away at 100 kph...
Only if you have 100 minutes in your hours.
 
D

Doug Miller

Jan 1, 1970
0
Stephen B. wrote:

23 minutes unless there is something wrong with my math. Now had you
said 23 miles away at 100 kph...

There's definitely something wrong with your math.
23 km / 100 kph = 0.23 hours, or 13 minutes 48 seconds.
 
D

Doug Miller

Jan 1, 1970
0
Not at all stupid. 100kph is a quite reasonable average speed over
distance. 100 mph is not.

Absolutely it's a stupid example -- although the demonstration of its
stupidity could have been better done, e.g. "If you're going 60 mph, a 300
mile trip also takes five hours. If you're only using one set of units, it
doesn't make any difference what they are."
 
D

Doug Miller

Jan 1, 1970
0
THE metric unit of time is the second. Minutes and hours are not
metric.

I suppose you'll be leading the charge, then, to have vehicle speedometers
changed over to meters per second? Don't forget the speed limit signs, too.
 
D

Dick Adams

Jan 1, 1970
0
but they are still within the range of temperatures people can
South Florida. It never gets below 0 C here.
That is the threshold that would make me move farther south.

Water pipes are above-ground in South Florida?

I need to live somewhere it freezes so last year's insects die.

Dick
 
G

George E. Cawthon

Jan 1, 1970
0
Mark said:
I have such a thermometer too. Usually the accuracy of the
thermometer is so low that the extra digit provides no useful
information. I round those numbers almost automatically. One night the
low was 32F (the actual display was 31.8F).
Mine are very accurate, and yes when I record the
temperature I round it. The real issue is that
most people use thermometers to determine
temperatures that are constantly changing. Check
a digital one with an outside probe attached.
The inside temperature is in a housing that is
heavy enough to act as a heat reservoir so the
temperature changes slowly, while the outside one
has hardly any heat sink.

I have a dual sensor thermometer sitting on a file
case in my office. Under carefully controlled
conditions both the internal and the outside
sensors read the same. In actual practice the
outside and inside sensors seldom read the same
even though the sensors are only 5 inches apart.
I can walk past the sensors (about 2 feet away)
and stir the air enough that the outside sensor
changes 0.4-0.5 degrees.

Outside, temperatures often fluctuate so much that
anything less that a degree makes no sense. I
find it hilarious to listen to the weatherman say
excitedly say that the first freezing night of the
fall was 27 degrees. What he never says is the
period. That low of 27 degrees may have existed
less than a minute and most likely less than 5
minutes and the time below 32 degrees may have
been less than 10 minutes.
 
Water pipes are above-ground in South Florida? Yup

I need to live somewhere it freezes so last year's insects die.
That is a problem but we deal with it.
In real life I lived in Md and the insects did just fine from year to
year.
The predators live all year long here too. You just have to recognize
the good guys and not kill them indiscriminately. A healthy population
of tree frogs keeps the roaches down.
 
T

T

Jan 1, 1970
0
WHAT?? The closest I said to that was that the light year is not a
metric unit.

I suppose you know a light year is NOT an amount of time.

Right, it's a distance and it is metric. Last I knew, light traveled at
approximately 3x10^8 m/sec.

A year is roughly 31,536,000 seconds. So light travels
9,460,800,000,000,000 m/year. Simplified, 9.5x10^15
 
T

T

Jan 1, 1970
0
It isn't??
A light year is the distance that light travels in one year. That
distance can be measured in metric or imperial. It's going to go
the same distance.


Yes it can be measured using both, but traditional usage in the
scientific community has always been metric.
 
T

T

Jan 1, 1970
0
But NEVER 65. That's too cold. I've been through that with my parents.

For some reason, it was elected to keep the operations center (computer
room) at my office at 65F. It is very cool in there.
 
T

T

Jan 1, 1970
0
Actually mine is at 65º right now. That is my usual daytime
temperature. At night it goes to 62º In the evening I go up to 67º and in
the morning right before we get up, I have it go to 69º

From 5:30AM to 8:30AM mine goes to 67F, then 62F until 4:30PM back to
67F until 11:45PM and then to 62F.
 

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