A grandfather clock is controlled by a swinging brass pendulum that is 1.5 m long at a temperature of 31°C.
(a) What is the length of the pendulum rod when the temperature drops to 0.0°C? (Give your answer to at least four significant figures.)
?_______ mm
(b) If a pendulum's period is given by
T = 2π
 | L/g |
,
where
L is its length, does the change in length of the rod cause the clock to run fast or slow?
