FL 6, C and P #27

faceAI
Posts: 2
Joined: Tue May 08, 2018 1:12 am

FL 6, C and P #27

Postby faceAI » Tue May 08, 2018 1:15 am

Measurements are made in two arteries with the same diameter and the same flow rate. One artery is in the head and the other is in the leg. In a person standing upright, which of the following statements is true?
Answer is
D. The pressure of the blood in the leg is greater than the pressure of the blood in the head.

It makes common sense, but the explanation doesn't help me scientifically understand what is happening. PE = KE? But where does pressure come into place?

Thanks!
faceAI
Posts: 2
Joined: Tue May 08, 2018 1:12 am

Re: FL 6, C and P #27

Postby faceAI » Tue May 08, 2018 2:55 am

C and P #29

Which of the following compounds would have the highest melting point?

A. n-octane (correct)


B. 2,3-dimethylhexane


C. 2,4-dimethylhexane


D. 3-ethyl hexane

I was under the impression that branching increases MP as the added branches make the molecule's shape more compact and easier to stack into a solid. Whereas branching decreases BP because of reduced surface area for intermolecular forces. Wouldn't n-octance have a higher BP, but low lower melting point compared to branched compounds?

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