IOAA 2013, Отборен тур, вертикални въпроси — Задача 14. N.
13 т.
Условие
i. By how many magnitudes will the magnitude of the faintest stars that can be detected by a CCD increase, if the exposure time is doubled? (up to two decimals) [3 т.]
ii. Sombrero Galaxy, Tadpole Galaxy, Black Eye Galaxy, Hoag's Object [4 т.]
iii. How many flavours do the quarks have? [1 т.]
iv. How many colours do the quarks have? [1 т.]
v. A star with R.A. = rises in the sky at L.S.T. = . How long the star will stay above the horizon (hh:mm)? [4 т.]
Отговори
i. 075
Printed after the question as the grid entry (“- 075”) of the crossword answer sheet.
ii. 5682
Printed after the question as the grid entry (“- 5682”) of the crossword answer sheet.
iii. 6
Printed after the question as the grid entry (“- 6”) of the crossword answer sheet.
iv. 3
Printed after the question as the grid entry (“- 3”) of the crossword answer sheet.
v. 2314
Printed after the question as the grid entry (“- 2314”) of the crossword answer sheet.
Решение
Внимание: Непълно решение
The paper prints only the answer code after each question (the crossword grid entry); no worked solution is given.
i. - 075
ii. - 5682
iii. - 6
iv. - 3
v. - 2314
Оригинал в Архива: Vertical_questions.pdf