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

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$1.4$

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(A) The upward force due to surface tension $(F)$ is given by the formula $F = T 	imes L$,where $T$ is the surface tension and $L$ is the inner circumference of the capillary tube.Given: $F = 98 	ext{ dyne} = 98 	imes 10^{-5} 	ext{ N}$ (since $1 	ext{ dyne} = 10^{-5} 	ext{ N}$).Surface tension $T = 7 	imes 10^{-2} 	ext{ Nm}^{-1}$.We need to find the circumference $L$.Using the formula $F = T 	imes L$,we get $L = F / T$.$L = (98 	imes 10^{-5} 	ext{ N}) / (7 	imes 10^{-2} 	ext{ Nm}^{-1})$.$L = 14 	imes 10^{-3} 	ext{ m}$.$L = 0.014 	ext{ m} = 1.4 	ext{ cm}$.

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