IOAA 2013, Отборен тур, хоризонтални въпроси — Задача 12. L
IOAA 2013 — Team Competition: Horizontal questions · 17 т.
Условие
i. Pillars of Creation, Dumbell Nebula, Dark Horse Nebula (Great Dark Horse), Bubble Nebula, Engraved Hourglass Nebula [5 т.]
ii. What is the wavelength of the spectral line ? (integer) [4 т.]
iii. First planet to be discovered using Telescope (Mercury is 1, Neptune is 8) [1 т.]
iv. Consider an eclipsing binary, with central eclipses. Time between the first and fourth contact of primary eclipse is 1.5 hours and time between the 2nd and 3rd contact is 1 hour. Find the ratio of their radii. (integer) [1 т.]
v. The final Apollo lunar mission is Apollo _. [2 т.]
vi. How many times greater is the escape velocity of a satellite compared to the velocity that is required for an orbit with radius equal to the celestial body’s radius? (one decimal) [2 т.]
vii. A star is behind the Coalsack Nebula in a distance of 200pc. If its apparent magnitude is m=18mag and the optical depth of the Nebula is =1.38, what is its Absolute Magnitude? (integer) [2 т.]
Отговори
i. 82314
Answer code as printed after the points (digits only, without decimal point or units).
ii. 4862
Answer code as printed after the points (digits only, without decimal point or units).
iii. 7
Answer code as printed after the points (digits only, without decimal point or units).
iv. 5
Answer code as printed after the points (digits only, without decimal point or units).
v. 17
Answer code as printed after the points (digits only, without decimal point or units).
vi. 14
Answer code as printed after the points (digits only, without decimal point or units).
vii. 10
Answer code as printed after the points (digits only, without decimal point or units).
Решение
Внимание: Непълно решение
No worked solutions in the archive; only the answer codes printed after each question are available.
i. [5] - 82314
ii. [4] - 4862
iii. [1] - 7
iv. [1] - 5
v. [2] - 17
vi. [2] - 14
vii. [2] - 10
Оригинал в Архива: Horizontal_questions.pdf