PHUMA case studies
PHUMA · Put your knowledge to work in context.
This independent study page provides practice for PHUMA. Its editorial learning areas include spanish / math / biology / formal / social - integrated subject foundations. The questions develop subject knowledge and application through worked reasoning, distinctions between competing answers, and practical scenarios. Study the relevant guide before attempting a mixed set, then explain the evidence or calculation that supports each answer. Topics on this exam: spanish / math / biology / formal / social - integrated subject foundations. The PHUMA case studies are 4 cases and about 1,443 words.
1Potato-cell mass change and a controlled concentration comparison
A class analyzes a supplied dataset from equal-sized potato cylinders placed in several labeled solutions. The cylinders began with the same average mass, and the observation interval, temperature and blotting convention were matched.
262 words, about 1 min2A pea-plant cross and the meaning of an expected ratio
A hypothetical pea trait is controlled by a single autosomal locus with alleles P and p. Complete dominance is explicitly assumed: PP and Pp plants have purple flowers, while pp plants have white flowers.
264 words, about 1 min3Block on a Rough Incline: Does the System Move at All?
A 4.0 kg wooden block on a rough plane inclined at 25° to the horizontal is joined by a light string, passing over a small pulley at the top of the plane, to a 2.5 kg mass hanging freely. The coefficients of friction between block and plane are μs = 0.45 and μk = 0.35.
696 words, about 3 min4Two groups and one denominator
In a fictional training exercise, Group A contains 20 participants with a mean score of 60 on a classroom practice activity. Group B contains 30 participants with a mean score of 80 on the same activity and scale.
221 words, about 1 min