In a horizontal capillary tube, the rate of capillary flow depends on the surface tension force as well as the viscous force. Lueas and washburn showed that the length `(x)` of liquid penetration in a horizontal capillary depends on a factor `(k)` apart from time (t). The factor is given by`k = [(rTcos theta)/(2ne)]^(1//2)`, where r, T, `theta` and `ne` are radiusof the capillary tube, surface tension, contact angle and coefficient of viscosity respectively. If the length of liquid in the capillary grows from zero to `x_(0)` in time `t_(0), how much time will be needed for the length to increases from `x_(0) to 4x_(0)`.

In a horizontal capillary tube, the rate of capillary flow depends on

1.	In a horizontal capillary tube, the rate of capillary flow depends on the surface tension force as well as the viscous force. Lueas and washburn showed that the length `(x)` of liquid penetration in a horizontal capillary depends on a factor `(k)` apart from time (t). The factor is given by`k = [(rTcos theta)/(2ne)]^(1//2)`, where r, T, `theta` and `ne` are radiusof the capillary tube, surface tension, contact angle and coefficient of viscosity respectively. If the length of liquid in the capillary grows from zero to `x_(0)` in time `t_(0), how much time will be needed for the length to increases from `x_(0) to 4x_(0)`.
Answer» Correct Answer - `15 t_(0)`

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