High Tech Campus Cache Multi-Cache
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Difficulty:
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Terrain:
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Size: 
(small)
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From the 1st of January in 2006 the High Tech Campus is open for everyone between 07.00 and 20:30 on weekdays. As employees of the campus and freaks in geocaching we prepared a small tour (about 4 km) to show our lunch-break walking path.
THE CACHE DESCRIPTION HAS BEEN CHANGED PER JULY 2007
Because the campus is pretty high-tech the exercises are in technical English and might shunt you off. Furthermore some experience in mathematics (bring a calculator) and GPS device (bring the manual) is required. Put your bike, car or motor in one of the car parks indicated with Px. You can also reach the Campus by bus line 407 or line 1.
A = ...
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B = ...
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C = ...
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D = ...
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E not used
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L = ...
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M = ...
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N not used
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O = ...
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P = ...
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Q =...
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Gather the values for all letters by going to the coordinates below. There is no need to leave the road or go into a building!
N51° 24.797'
E005° 27.181'
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Collect letter/number combination from the largest square pole.
Note that there are nowadays multiple letter/number combinations. Take the one that points to the nearest, mentioned twice.
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N51° 24.659'
E005° 27.606'
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What is the length of this building? Value B is a centuple (round off).
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N51° 24.406'
E005° 27.018'
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How many poles with blue watercompany information are seen at the other side of the fence? Answer minus 2 gives C.
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N51° 24.531'
E005° 27.573'
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What campus-sport is practiced here? Answer gives D.
– Darts (10)
– Frisbee (21)
– Petanque (32)
– Table tennis (43)
– Yoga (54)
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N51° 24.561'
E005° 27.436'
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There used to be 4 lights mounted underneath the square part of this footbridge. This is the answer for L.
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N51° 24.679'
E005° 27.731'
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If a line would be drawn from one side (ene kant) to the other (andere kant), which direction (true north) would that line be pointing to? Sit down and think about it! Answer gives M.
– Between 35° and 125° (80)
– Between 125° and 215° (170)
– Between 215° and 305° (260)
– Between 305° and 35° (350)
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N51° 24.802'
E005° 27.381'
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Collect the values from the building.
Not 31; find multiple letter/number combinations here!
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N51° 24.604'
E005° 27.082'
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What is not seen on this pedestal? Answer gives Q.
– Head (4)
– Arms (5)
– Legs (6)
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X is a point in the lake of the High Tech Campus at N 51° 24.584' - E005° 27.440'.
| Willebrord Snel van Royen (1580-1626) |
Willebrord Snellius was a Dutch astronomer and mathematician, most famous for the law of refraction now known as Snell's law.
Snell's law is a formula used to describe the relationship between the angles of incidence and refraction, when referring to light or other waves, passing through a boundary between two different isotropic media, such as air and glass. The law says that the ratio of the sines of the angles of incidence and of refraction is a constant that depends on the media. |
A geocacher drops his working flashlight when walking through the lake. At the bottom of the lake it is still working. The light comes to the surface at point X in an angle  1 = (D + 13) = ... degrees.
The refraction index for water n1 = 1,333 and for air n2 = 1.
At what angle 2 does the light leave the lake? The answer gives W = 2 = ... degrees.
The angle towards the cache can be calculated by Y = O · W = ... degrees.
One can round off the value to above, but there is no need. |
| Christiaan Huygens (1629-1695) |
Huygens was the best known scientist of the Dutch Golden Age. His inventions and discoveries in astronomy, physics and mathematics revolutionized 17th-century science.
The strength of the centrifugal force comes from the mass of the body m, the distance between the body from the centre of the circular movement r and the angular speed v. |
A geocacher has a cache attached to a string and circles it around horizontally. At a certain moment the rope is released, throwing the cache from the lake at point X. The cache moves in a straight horizontal line.
The cache weights m = P = ... kilo and is thrown with a force of Fm = (M / A - Q) = ... Newton. The circular movement of the cache has a radius r = (B / 30) = ... metres. Calculate the speed in v = ... metres per second.
Assuming the cache moves horizontally (air friction and gravity can be ignored). How many meters has the cache travelled after 2 · (A + C + L + Q) = ... seconds? The answer gives Z = ... metres. |
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The cache can be found at Z metres and Y degrees from X. |
Have a nice walk and good luck!
The High Tech Campus Crew is Semiorka, TheFalcon, MADpalace, FerryStreens, Team Gelaen and THeMV.
Additional Hints
(No hints available.)