Help!! Which of the following could not act as a medium for a mechanical wave?
A. A solid rope
B. Liquid water
C. Empty space
D. Air​

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.

5 structural isomers

the isomers are:

n-exane :   ch3ch2ch2ch2ch2ch3

2-methylpentane :   ch3ch(ch3)ch2ch2ch3

3-methylpentane :   ch3ch2ch(ch3)ch2ch3

2,3-dimethylbutane :   (ch3)2chch(ch3)2

2,2-dimethylbutane :   (ch3)3cch2ch3