Describe the general traffic pattern when the road whose flow is X4 is closed
Solution
at point a according to KCL X1+40+X3+X4=0.........(1) at point c
100+X5=X3+X2............(2) at point b X1+X2=200.............(3) at point d
X4+X5=60.................(4) when X4 is blocked X5= 60 at point d......(from equation 4) and
substitute in equation in (2) from equation 3 we get X1= 200-X2 substitute in in equation 1 the
final equation we gt is X3+X2= 160 X3-X2=-240 X3= -40, X2=200 and therefore X1=0.
Describe the goal of an experimental research study and identify the.pdf
1. Describe the goal of an experimental research study and identify the two elements that are
necessary for an experiement to achieve its goal.
Solution
An experiment is a methodical procedure carried out with the goal of verifying,
falsifying, or establishing the validity of a hypothesis. Experiments vary greatly in their goal and
scale, but always rely on repeatable procedure and logical analysis of the results. A child may
carry out basic experiments to understand the nature of gravity, while teams of scientists may
take years of systematic investigation to advance the understanding of a phenomenon. An
experiment is a method of testing - with the goal of explaining - the nature of reality.
Experiments can vary from personal and informal (e.g. tasting a range of chocolates to find a
favourite), to highly controlled (e.g. tests requiring complex apparatus overseen by many
scientists hoping to discover information about subatomic particles).
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