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In which part of the bike a left-handed screw is used?

seat
steering
pedals
rear sprockets
For bicycle pedals, the screw on the right must be reverse-threaded, or the pedal will unscrew during use, being subject to counterclockwise torque (which would work to undo a right-hand thread).
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Answers by country

seat
steering
pedals
rear sprockets
answers
flagAustria
5%
5%
75%
15%
20
flagBelarus
0%
14%
70%
14%
27
flagRepublic of Ireland
0%
8%
69%
21%
23
flagGreece
0%
15%
65%
20%
20
flagthe Netherlands
0%
5%
65%
25%
20
flagAustralia
6%
4%
63%
24%
49
flagRussia
5%
3%
62%
26%
132
flagGermany
5%
4%
62%
27%
85
flagUkraine
2%
11%
55%
28%
163
flagFrance
0%
5%
55%
38%
18
flagPoland
4%
8%
49%
36%
12825
flagthe United Kingdom
4%
7%
48%
38%
181
flagGhana
0%
10%
47%
42%
19
flagUnknown
0%
12%
45%
41%
31
flagthe United States
4%
9%
42%
40%
493
flagIndia
7%
17%
42%
30%
445
flagthe Philippines
11%
14%
42%
31%
35
flagPakistan
0%
11%
41%
47%
34
flagSouth Africa
9%
4%
38%
42%
21
flagCanada
5%
2%
33%
53%
39

How do baby birds get oxygen inside their eggs?

They have a large oxygen supply from the start
Oxygen is created during protein reduction
Oxygen comes in through pores in the shell
They don't need oxygen at all

When is the Eiffel Tower the highest?

In winter
In spring
In summer
In autumn

Does the candle burn more or less violently in zero gravity?

more violently
about the same
less violently
nobody knows

Are gas fittings tightened clockwise or anti-clockwise?

clockwise
anti-clockwise
it depends on the gas
there is no standard