Which of the following is used to determine whether a person has been infected with hiv? a) determining whether the person has had sexual intercourse with an infected person b) determining whether the person has antibodies to hiv in their blood c) determining whether the person is an intravenous drug user d) determining if the person has aids

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

i hope this you

not: both offer magnification to the atomic level.