Question:

2.The following observations were taken for determining surface tension o of water by capillary method: diameter of capillary, D = 1.25 * 10 ^ – 2 rise of water, h = 1.45 * 10 ^ – 2 * m Using g = 9.8 * m / s ^ 2 and the simplified relation sigma = (mhg)/2 * 10 ^ 3 * Nm the possible error in surface tension is closest to