I need help with letter D and number 9 pleaseee

The wave shown on the electromagnetic spectrum disturb the medium it passes through a)different frequency. b)the same frequency .

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

In which block of the periodic table is uranium (u) found? s blockd blockp blockf block