I have just had an important meeting interrupted by the news that the Francis fan club are revolting
..I mean that in a good way; it's good to see such mirth at my obvious discomfort
That's better I had my pants in a bunch, but it is all straightened out now.
Thanks for the heads up TTH; as for you C-J, you have some moxy to incite a riot. I've got your number lady. ..and I like those figures.
Back to the Francis uprising;
My question:
Now; Nürnberg is approximately 90 miles due west of Prague. How much sooner would a person in Prague first see the rising sun than a person in Nürnberg.
(Even the casual reader will note:
90 miles)
1. Both persons almost see the sunrise at the same time sine they are at the same time zone.
2. the speed of the rotation of the earth is 1 revolution per day.
1 revolution = the perimeter of the earth= 2 Pi r
r=6.4x10^3 km is the radius of the earth
=> 1 revolution= 2 x 3.14 x 6.4x10^3
=40192 km
Therefore the speed of the earth is:
t= (40192/ 24) km/hr=1675 km/hr= (1675/1.609) mile/3600 second= .2891 mile/sec
1 mile=1.609 km; 1 hour= 3600 seconds.
We are given that the distance between this two cities is 90 miles, so after T seconds the person on the west side will see the sunrise:
T= 90 miles / .2891 mile/sec = 311 seconds
=5.2 minutes
So the person on the east side will see the rising sun about 5.2 minutes sooner than the one on the west side.
Francis re-wrote the question:
"Distance from Prague to Nürnberg is 250 kilometers or
155 miles."
From the international clock, as today:
Prague - sunrise 05 h 06
Nurnberg - sunrise 05 h 22
Difference: 16 minutes
But one can do that by the coordinates:
Prague: 14° 25' east
Nürnberg: 11° 05 east
Difference 3° 20'
360°= 1440 minutes,
then 3.30x1440/360= 13.2 minutes
The small differences due to elevation, figures accurateness, etc...
I do like the way you can get the answer from coordinates

. Viva La France.
SIDEBAR:
?'dialog'
Not in my book, are you thinking in straight lines?
If this is: Feelings
What do you have with this: Flingees
8 bits =
strong