Question

Mercury level in a thermometer changed from
10°C to 20°C. If 0.5 Pa pressure is increased in
average per each degree rise in temperature, then
express the change in average thrust acting on the
walls of container between these temperatures in
terms of thrust at 10°C and the area of cross sec
tion of capillary tube is uniform (Consider average
pressure at 10°C as 5 Pa).
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Answer 1

Answer:

do try with the formula c/5= ?=?