Specific gravity is a property that describes how dense something is compared to water (density = 1 g mL ). For instance, sulfur has a specific gravity of 2.0, which means it has a density of 2.0 g mL . The table lists the specific gravity of four common metals. Making instruments to transmit sound is an important technological advancement. If a designer wants to transmit sound as quickly as possible through a wire made of one of these substances, which substance would she choose?

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How does the nervous system affect the excretory system?

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.