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Volume = cross sectional area * lengthArea = 2* cross sectional area + perimeter of cross section * length
If the diameter doubles (x2), the cross-sectional area quadruples (x4).
Other things being equal, more cross-sectional area will cause less resistance.
9 AWG
It depends on what you mean by a 30 pipe. Is 30 the cross sectional area - in which case, what is the length of the pipe? Is 30 the length - in which case, what is the cross-sectional area?
cohort-sequential
Cross sectional
A cross-sequential research study is a combination of cross-sectional and longitudinal research methods. It involves studying different age groups at multiple points in time to examine both age-related and time-related changes over the course of the study. This approach allows researchers to better understand how development unfolds over time and across different age cohorts.
Cross sequential studies combine both longitudinal and cross sectional methods in an attempt to both shorten the length of the research and minimize developmental assumptions
cross-sectional
A between-subjects design is used to study differences between groups of people. This design involves comparing the performance or outcomes of one group to another group under different conditions or treatments. It helps researchers determine if there are significant differences between the groups being studied.
Cross-sectional research design allows for data collection at a single point in time, providing a snapshot of a population's characteristics. It is relatively quick and cost-effective compared to longitudinal studies. It can identify correlations between variables and is useful for generating hypotheses for further investigation.
advantage of cross sectional study?
You cannot create a cross sectional area of a rectangle. You can only create cross sectional areas for triangular shapes.
The quickest way to study changes over the life span is through cross-sectional research. Cross-sectional studies (also known as Cross-sectional analysis) form a class of research methods that involve observation of some subset of a population of items all at the same time, in which, groups can be compared at different ages with respect of independent variables, such as IQ and memory ... Source: en.wikipedia.org/wiki/Cross-sectional_research
The quickest way to study changes over the life span is through cross-sectional research. Cross-sectional studies (also known as Cross-sectional analysis) form a class of research methods that involve observation of some subset of a population of items all at the same time, in which, groups can be compared at different ages with respect of independent variables, such as IQ and memory ... Source: en.wikipedia.org/wiki/Cross-sectional_research
the larger the cross sectional area, the smaller the resistance