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card_29794.txt
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Text File
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1991-04-08
|
823b
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38 lines
-- card: 29794 from stack: in
-- bmap block id: 0
-- flags: 4000
-- background id: 4601
-- name: #88
----- HyperTalk script -----
on openCard
global group,rightone
put 8 into group
put "C" into rightone
pass openCard
end openCard
-- part contents for background part 20
----- text -----
Question #8
-- part contents for background part 1
----- text -----
3BC-2.4 What is the principal reason the 160 meter through 40 meter bands are useful for only short-distance radio communications during daylight hours?
-- part contents for background part 11
----- text -----
F-layer bending
-- part contents for background part 27
----- text -----
Gamma radiation
-- part contents for background part 28
----- text -----
D-layer absorption
-- part contents for background part 29
----- text -----
Tropospheric ducting