Aichi Entrance Science case studies
Aichi Entrance Science · Put your knowledge to work in context.
The Aichi Entrance Science case studies are 5 cases and about 4,389 words.
1Sled test on a salted slope: is the safety barrier adequate?
A loaded sled with a total mass of 40 kg (sled plus rider) is released from rest at the top of a straight snowy slope 12 m long, inclined at 25° to the horizontal. The top 8.0 m is hard-packed snow with a coefficient of kinetic friction of 0.02; the bottom 4.0 m has been salted and is wet, with a coefficient of 0.25.
889 words, about 4 min2Over-running a filament bulb from a 9 V battery
A student must run a 6.0 V, 3.0 W filament bulb from a 9.0 V battery whose internal resistance is 1.5 Ω. Connected directly across the battery, the bulb draws 0.62 A, glows brighter than normal, and the glass begins to darken after a few minutes.
842 words, about 4 min3Labelling four unlabelled sodium salt solutions
Four unlabelled bottles of colourless solutions are known to be sodium chloride, sodium sulfate, sodium carbonate and sodium iodide, but their labels are missing. A student flame-tests all four and sees a persistent yellow flame from each, which she finds unhelpful.
794 words, about 4 min4Genetic counselling after a first affected child
A couple, both unaffected, have a two-year-old son who has just been diagnosed with a condition caused by a single autosomal recessive gene. There is no other known case in either family.
919 words, about 5 min5Ridge cloud, a thunderstorm warning and morning fog
A coastal town sits at sea level on the windward side of a ridge 900 m high, about 6 km inland. On a summer afternoon the air at the shore is at 24 °C with a dew point of 14 °C, and a steady onshore breeze carries it towards the ridge.
945 words, about 5 min