Question: The world's largest deposit of natural bitumen, known as the Athabasca oil sands is located in the McMurray Formation of Northern Alberta. This formation is from the early Cretaceous, and is composed of numerous lenses of oil-bearing sand with up to 20% oil. Isotopic studies attribute the oil deposits to be about 110 million years old. Two smaller but still very large formations occur in the Peace River oil sands and the Cold Lake oil sands, to the west and southeast of the Athabasca oil sands, respectively. Of the Alberta bitumen deposits, only parts of the Athabasca oil sands are shallow enough to be suitable for surface mining. The other 80% has to be produced by oil wells using enhanced oil recovery techniques like steam-assisted gravity drainage.
Try to answer this question if possible: What percentage of recovery of bitumen is by oil wells?
Answer: 80%
Question: Rapid decompression can be much more dangerous than vacuum exposure itself. Even if the victim does not hold his or her breath, venting through the windpipe may be too slow to prevent the fatal rupture of the delicate alveoli of the lungs. Eardrums and sinuses may be ruptured by rapid decompression, soft tissues may bruise and seep blood, and the stress of shock will accelerate oxygen consumption leading to hypoxia. Injuries caused by rapid decompression are called barotrauma. A pressure drop of 13 kPa (100 Torr), which produces no symptoms if it is gradual, may be fatal if it occurs suddenly.
Try to answer this question if possible: What will seep out of the windpipe if you hold your breath?
Answer: unanswerable
Question: Many of the city's buildings are in the Georgian style, although there are a number of examples of modern landmark structures, such as County Hall tower, which was, at one time the tallest building in Ireland until being superseded by another Cork City building: The Elysian. Across the river from County Hall is Ireland's longest building; built in Victorian times, Our Lady's Psychiatric Hospital has now been renovated and converted into a residential housing complex called Atkins Hall, after its architect William Atkins.
Try to answer this question if possible: What was Atkins Hall turned into?
Answer: unanswerable
Question: An alternative concept is that they formed closer to the Sun, where the matter density was higher, and then subsequently migrated to their current orbits after the removal of the gaseous protoplanetary disc. This hypothesis of migration after formation is favoured, due to its ability to better explain the occupancy of the populations of small objects observed in the trans-Neptunian region. The current most widely accepted explanation of the details of this hypothesis is known as the Nice model, which explores the effect of a migrating Neptune and the other giant planets on the structure of the Kuiper belt.
Try to answer this question if possible: If Neptune formed closer to the sun, what caused it to migrate to it's current orbit?
Answer:
removal of the gaseous protoplanetary disc