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(A) The upward force due to surface tension $(F)$ is given by the formula: $F = T \cdot L$,where $T$ is the surface tension and $L$ is the inner circu

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$1.5$

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(A) The upward force due to surface tension $(F)$ is given by the formula: $F = T \cdot L$,where $T$ is the surface tension and $L$ is the inner circumference of the capillary tube.Given: $F = 105 	ext{ dyne} = 105 	imes 10^{-5} 	ext{ N} = 1.05 	imes 10^{-3} 	ext{ N}$.Surface tension $T = 7 	imes 10^{-2} 	ext{ N/m}$.We need to find the circumference $L$.Using the formula $L = F / T$:$L = (1.05 	imes 10^{-3} 	ext{ N}) / (7 	imes 10^{-2} 	ext{ N/m})$$L = 0.15 	imes 10^{-1} 	ext{ m} = 0.015 	ext{ m}$.Converting to centimeters: $L = 0.015 	imes 100 	ext{ cm} = 1.5 	ext{ cm}$.Thus,the inner circumference of the capillary tube is $1.5 	ext{ cm}$.

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