Heat and Thermal ExpansionEasy
Question
A metal ball immersed in alcohal weigh W1 at 0o and W2 at 50o. The coefficient of cubical expension of the metal is less than the alcohol. Asssuming that the density of the metal is large compared to that of alcohol, it can be shown that
Options
A.W1 > W2
B.W1 = W2
C.W1 < W2
D.All of these
Solution
Wapp = Wactual - Upthrust
Upthrust F = V′sρ′Lg
Here, Vs = volume of solid, ρL = density of liquid
At higher temperature F′ = V′sρ′Lg
∴
Since, γs > L (given)
∴ F′ > F or W′app > Wapp
Upthrust F = V′sρ′Lg
Here, Vs = volume of solid, ρL = density of liquid
At higher temperature F′ = V′sρ′Lg
∴
Since, γs > L (given)
∴ F′ > F or W′app > Wapp
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