After
In
(a)
(b)
(c)
(d)
up
(e)
II. It is gravity that make the pendulum
clock keep time, by pull the
pendulum bob down to the centre
of the Earth whenever that swings
above it lowest point. The
gravitational force on the poles is
slightly more than that at the
equator. Therefore, it you take a
pendulum clock from Panama until
Alaska, it will gain near three
minutes a day.
(g)
09
(h)
6)
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