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Suppose two children push horizontally, but in exactly opposite directions, on a third child in a wagon. The first child exerts a force of 75.0 N, the second a force of 93.0 N, friction is 12.0 N, and the mass of the third child plus wagon is 22.0 kg.
(a) What is the system of interest if the acceleration of the child in the wagon is to be calculated? (Select all that apply.)
the wagonthe child in the wagonthe children outside the wagon
(b) Draw a free body diagram, including the weight and all other forces acting on the system.
(c) Calculate the acceleration. m/s2
(d) What would the acceleration be if friction is 18.0 N?
Describe how you would investigate the reliability of a screening test and how you would test for both inter-observer and intra-observer variation.
q1. thirteen-year-old ryan has begun to challenge many of his parents values and to express his own set of highly
Explain two ways that mutations can affect the phenotypes that does not include alteration of the protein coding sequence.
Describe two different population genetic mechanisms that may cause populations to experience imperfect adaptation. Give an example of one of the mechanisms and describe how it leads to imperfect adaptation.
How many international units of creatine kinase are present in the sample?
Both directional and stabilizing selection affect the additive variance in quantitative traits. Given their effects, how much additive genetic variance do we expect to find in traits that affect fitness?
Pick one bacterial, a viral, and eukaryotic pathogen of the Digestive, Circulatory, or lymphatic or nervous system.
One healthy, female endurance athlete (BW = 64 kg) will perform two bouts of prolonged running exercise (90 min at 175 m/min) in an environmental chamber on 2 separate days under different conditions: 1) at 21 C and 2) at 34 C.; each trial at..
What factors account for differences in responsiveness of individuals to same training program. discuss changes you would make in your current rehabilitation.
How do human activities influence the biosphere? Please be specific, but simple to understand.
Why are homologous characteristics more useful than analogouscharacteristics in constructing phylogenetic trees? What types oftrees might result from using analogous characteristics, and why?
Which genetic material was discovered by Robert Brown and in which year.
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