I would like to repeat this project in September in the time of the spring equiniox
Last Updated on Wednesday, 25 November 2009 13:41
from honkers
Thursday, 20 August 2009 06:43
administrator
Probably means noting except for fof the fact that I did this to clear my conscience! As soon as I could get out the door at 12.35 pm, I measured it to be 0.155m.
Downtown Hong Kong is 22 20 N 114 11 E
Cheers
Paul
As it turns out, 12.36 is the solar noon for Hong Kong. your measurements are actuall pretty accurate, especially after bench correction.
:-)
Last Updated on Wednesday, 25 November 2009 13:39
The results are starting to come in
Wednesday, 19 August 2009 10:43
administrator
These results are for Wednesday, August 19th at noon
Don't forget to check out the blog
Mike Leishman was in the Mount Tom Price shopping center. He rang me to tell me he and his wife Jan had a lot of fun mystifying the locals "measuring the diameter of the earth".
latitude 21° 41'40.2"S longitude 117° 47'42.844"E Loction Tom Price shopping centre
time 12:00 midday lenght of shadow for 1.35M stick - 0.90M
direction of shadow 180°(due south)
Reg Whitely : The Year 5/6 class at Beachlands Primary School, Geraldton, took part in Mr Weber's 'Numbat Conspiracy' Eratosthenes Project to help calculate the circumference of the Earth.
Longitude 28 degrees, 47 min 14 sec South, latitude 114 degrees 36 min 14 sec East.
Length of 1 m shadow stick = 88cm +/- 2mm.
Angle of shadow 8 degrees west of north, lying in southerly direction. Make sense ? That's tricky for year 5/6s! We actually measured 352 degrees but that would make it face north, so what's the opposite measurement?
From John Thorpe at St Hilda's AGS, Perth, Western Australia
Hi Mark
My Astro Society was very interested in your measuring the earth project. We were blessed with enough sunshine to make the observation and recorded a shadow length of 99 cm with a 1 m ruler. The hardest bit was finding a 1 m ruler. This gave us an angle of 45.29 degrees.
According to Google, our school is Lat: -32 degrees, Long: 115.76 degrees
The only problem is that we have no school access to Facebook so I am not sure where to go from here!
We would be interested to hear other results.
Best wishes
John
Paul McMahon (Hong Kong) wrote at 12:25pm
Bummer guys. Midday in Hong Kong was a bit like midnight in Perth!
Took out all of the gear and looked like a very suspcious customer in Hong Kong Central with the gear but alas.
Nothing cast a shadow. Big Dark rain clouds for hours.
Sorry. Will try to repeat tomorrow if any use.
Mark Weber
Warwick Senior High School
We had a shadow of exactly 1 m from a one meter from a one meter rule. Interestingly, the shadow fell almost due south.
Eratosthenese was the librarian in Alexandria about 2000 years ago.
By inference and measurement, he proved the world was round and measured it's circumference.
We will attempt to do this at Warwick Senior High School with students in Singapore and Hong Kong, with a couple of old snoozers in the north west on long service leave.
Last Updated on Wednesday, 25 November 2009 13:38
Warwick students trial Eratosthenes method
Tuesday, 18 August 2009 13:26
administrator
Students at Warwick Senior High School have trialled their method of measuring the length of a shadow.
We have a 1 meter rule, compass and plumbob. We will accuratlely measure the shadow on Wednesday, August 19th 2009 to determine the circumference of the earth.
Warwick SHS were the only school to send a team to the ACEC2010. Included in the party were the five team members and WSHS Principal, Ms Leslie Wintle.
The team returned enthoused with the goal of changing pedagogy within the classroom by embedding computers into the curriculum.
