Agroup of engineers has just conducted an experimental trial on a shoe
designed to people suffering from a painful foot disorder. during the trial,
the shoe proved effective for only 5% of the test subjects. what should the
engineers do next?
a. use a cheaper material to make the shoe more profitable.
o
b. find out if the sole of the shoe can be redesigned
o
c. begin to market this new shoe to patients and doctors.
d. conduct the test again.
o
submit
previous

B.

Explanation:

If only 5% of the experiments work then they should not Bring it to market or use cheaper material because it wont help.  Redesign the shoe till it is efficient

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.