Why can synthetic polymers be altered to create so many different kinds of materials?

they have a hydrocarbon backbone that can be chemically altered.

they have certain additives that react to form newer materials.

they have a low molecular weight that alter their composition.

Compare the depth of field when focusing with low power and high power. which power has the greater depth of field?

What is the cause hearing loss in human being

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.