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some radio waves can penetrate the ionosphere just not all.. so id say your original summary notes are right

juts wondering if we need to kno any pracs for the exam, and if so, are there any specific ones? cheers

yeh i said because 75-79 only has a range of 4 where as 80+ will have a range of over 4

can someone please remind me the structure of both papers? cheers

are we likely to be tested on obtuse angles in the exams? eg -cos y = cos (180 - y) -if sin y is positive is it acute or obtuse or watever those questions are like any help would be great

thanks for the help ill keep that in mind come the exam cheers

i was wondering whether we are supposed to use 365 for a year of 365.25, and the same for weeks in a year, 52 or 52.14????? any help would be much appreciated