The coefficient of cubical expansion of mercury is 
and that of brass 
. If a barometer having a brass scale were to read 74.5 cm at 
, find the true barometric height at 
. The scale is supposed to be correct at 
.
Text Solution
Verified by ExpertsThe correct answer is:
A
The brass scale is true at 
, therefore at 
, its graduations will increase in length and hence, observed reading will be less than actual reading at 
.
The change in reading,
Actual reading at 
,
Assuming area of cross-section to be constant, we have
Therefore, true height at 
,
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
Two rods of different materials having coefficients of thermal expansion and Young's moduli respe…
A steel rod of diameter 1 cm is clamped firmly at each end when its temperature is , so that it ca…
The coefficient of linear expansion of crystal in one direction is and that in other two direction…
On heating a liquid having coefficient of volume expansion in a container having coefficient of li…
A glass flask of volume is just filled with mercury at . The amount of mercury that will overflow…
How much heat energy is gained when 5 kg of water at is brought to its boiling point,
(Specific he…