The mass of an empty density bottle is 30g. When filled with a liquid, the...
PHYSICS
WAEC 2014
The mass of an empty density bottle is 30g. When filled with a liquid, the mass of the bottle and the liquid is 40g. On heating the filled bottle through 40ºc, the mass reduces to 38g. Calculate the apparent cubic expansivity of the liquid
- A. 6.25 x 10K-1
- B. 6.25 x 10-3K-1
- C. 2.50 x 10-3K-1
- D. 2.50 x 10-4K-1 A. 6.25 x 10K-1
- B. 6.25 x 10-3K-1
- C. 2.50 x 10-3K-1
- D. 2.50 x 10-4K-1
Correct Answer: B. 6.25 x 10-3K-1
Explanation
Apparent cubic expansivity = \(\frac{\text{mass of hot liquid expelled}}{\text{mass of hot liquid left x temp. rise}}\)
= \(\frac{2}{8 \times 40} = 0.00625\)
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