Questions
A clock with a metal pendulum beating seconds keeps correct time at 0°C. If it loses 12.5 s a day at 25°C, the coefficient of linear expansion of metal pendulum is
a
186400/C ∘
b
143200/C ∘
c
114400/C ∘
d
128800/C ∘
detailed solution
Correct option is A
Number of seconds lost in a day, Δt=12αΔθ×86400The coefficient of linear expansion of metal pendulum, α=2ΔtΔθ×86400=2×12.525×86400⇒ α=186400/C ∘Talk to our academic expert!
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