6 . . . . . a crest
7 . . . . . the amplitude
8 . . . . . the wavelength
9 . . . . . a trough
60 RPM equals one hertz (i.e., one revolution per second, or a period of one second). The SI unit for period is the second.
C. amphibian eggs do not contain a protective shell
Both electric and magnetic fields
This is considered to a personal distance or otherwise known as personal space. Most of the people who seriously value the personal distance are because of anger, anxiety, and discomfort. They usually give permission to the people or acquaintances to enter in his or her personal distance.
