Vhod v Vipavsko jamo se nahaja v delu Vipave imenovanem Podskalca. Prvi del jame je naravna votlina, od tu dalje pa so leta 1910 kopali rov. Našli naj bi žilo živosrebrne rude. Ta umetni rov se po 238 m razširi v naravno dvorano Veliko jezero. Ob desnem robu jezera nadaljujemo do naslednjega umetnega rova.
V Velikem jezeru se je potapljalo že več potapljačev. Potopljeni rovi so velikih dimenzij in v njih so dosegli globino 44 m.
Jama se nato z Drugim umetnim rovom nadaljuje še 178 m. Nekje na polovici umetnega rova se v njegovem dnu odpira ozek rov, ki nas pripelje do sifona.
Tik pred koncem Drugega umetnega rova je bila razpoka, iz katere je pihalo. V osemdesetih so opazili, da se je ta razpoka podrla, nato pa so podor tako razširili, da so splezali v Naravni rov. Visoke vode leta 2001 so prehod spet zasule, tako je naravni del trenutno nedostopen.
Vaša naloga:
Glede na to, da so v jami iskali živo srebro, naj bo tudi naloga o tej temi:
Živosrebrni termometer je sestavljen iz steklene bučke in kapilare s stalnim presekom. Pri temperaturi 0 °C je bučka, s prostornino 300 mm3 ravno polna živega srebra. Pri tej temperaturi je notranji presek kapilare 0,020 mm2.
Prostorninska razteznost živega srebra je 1,82x10-4 K-1. Termometer je iz posebnega stekla, ki se tako malo razteza, da raztezanje stekla zanemarimo.
Do katere višine (AB,CD mm) se dvigne živo srebro, če ima termometer temperaturo 25 °C?
Končne koordinate: N 45° 50.ABC' E 13° 57.B(D+2)B'
V jamo vstopate na lastno odgovornost! Če se podajate vanjo sami, o svoji nameri nekoga obvestite.
ENG
The entrance to the Vipava Cave is located in the part of Vipava called Podskalca. The first part of the cave is a natural cavern, and from here on, a passage was dug in 1910. They were expecting to find a vessel of mercury ore. This artificial tunnel extends into the natural hall of the Great Lake after 238 m. Continue along the right edge of the lake to the next artificial tunnel.
There have already been several dives in the Great Lake. The submerged trenches are large in size. They reached a depth of 44 m.
The cave is then continued for another 178 m with the Second Artificial Trench. Somewhere in the middle of the artificial tunnel, a narrow tunnel opens at its bottom, leading us to a siphon.
Just before the end of the Second Artificial Trench, there was a crack from which wind blew. In the 1980s, they noticed that the crack had broken and then the tunnel was widened so much that they climbed into the Natural Trench. The high waters of 2001 flooded the passage again. Thus, the natural part is currently inaccessible.
Your task:
Given that they searched for mercury in the cave, there should also be a task on this topic:
The mercury (Hg) thermometer consists of a glass flask and a capillary with a constant cross-section. At 0 °C, a flask with a capacity of 300 mm3 is exactly filled with mercury. At this temperature, the internal section of the capillary is 0.020 mm2.
The volumetric expansion of mercury is 1.82x10-4 K-1. The thermometer is made of special glass, which stretches so little that the elongation of the glass is neglected.
To what height (AB, CD mm) does the mercury (Hg) rise if the thermometer has a temperature of 25 °C?
Final coordinates: N 45° 50.ABC' E 13° 57.B(D+2)B'
You enter in the cave at your own risk!
