Digital Magazine "Maths and Science Adventure" Digital Magazine "Maths and Science Adv_1st issue | Page 26

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26
The Bulgarian
team
match tips in a
bottle full of wa-
ter. The match
tips have a small
amount of air
trapped within,
so when the bot-
tle is squeezed,
the match tips
sink because of
air pressure.
Checkpoint #4
presented some
peculiar me-
chanical tricks.
The first trick
was taking a
string with heav-
ier and lighter
weights in the
ends and hold-
ing it in a certain
way. When the
lighter one was
let go, it started
swinging to-
wards the center,
and the heavier
one fell straight
down. But the
string that is be-
tween the finger
and the lighter
weight got short-
er, as the heavier
weight fell down.
This causes the
lighter weight to
go faster, and
when done right,
swing over the
finger. It includ-
ed multiple tries.
The second trick
was spinning a
gyroscope.
Shingle Church
Kärsämäki is a
small vil-
lage, but it
still has a
few beau-
tiful places
to visit.
One of
them is
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Shingle Church,
which is known
even outside Fin-
land. During our
visit to Finland
we had the op-
portunity to see
it. Firstly, we saw
a movie about it
At checkpoint #5
sound resonance
was demonstrat-
ed with a few
metal rods and
forks attached to
metal plates.
Same sized met-
al forks resonat-
ed when one of
them was hit
with a rubber
hammer. Then
one of the forks
was tuned with a
blocker in order
to change its fre-
quency just a lit-
tle bit to create a
“beat” effect.
01.03.2017
and learned that
it was built in
2004 by volun-
teers, in the
place where the
first church in
the village was
built.