Three apprentice tailors (x, y, and z) are assigned the task of measuring the seam of a pair of trousers. each one makes three measurements. the results in inches are x (31.5, 31.6, 31.4); y (32.8, 32.3, 32.7); z (31.9, 32.2, 32.1).the true length is 32.0 in. comment on the precision and the accuracy of each tailor's measurements.

Explanation:

Average of reading of X = 31.5

Average of reading of Y = 32.6

Average of reading of Z = 32.06

True measurement is 32.0 so Z's is closest to the true value so Z is most accurate and Y is least accurate.

Since all of them have reading instrument which can read upto 0.1 so the precision of their measuring instrument is equal . Actually their measuring instrument appears to be same.so precision of their measurement is same.

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.