Levi is installing a heat pump. He installed the pipes two feet deep. He then installed the unit withín the house and installeda thermostat inside to regulate the heat purmp. Lastly, he installed a furnace in the baserment.
Which best describes Levi's errors?
O The pipes need to be at least six feet deep to avoid the freezing ground, and he did not need to install a furnace.
O He did not need to install a furnace, and pipes are not necessary in the installation and function of a heat purnp.
O Thermostats should be installed directly to the outsíde unit, and the pipes need to be at least six feet deep to avoid
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the freezing ground.
O Pipes are not necessary in the installation and function of a heat pump, and thermostats should be installed directly
to the outside unit.

It is A

Explanation

O The pipes need to be at least six feet deep to avoid the freezing ground, and he did not need to install a furnace.

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.

what are the statements