Question

read the abstract and then answer the question.
gravity and drag both reduce the maximum altitude that a rocket can reach, increasing
the cost of rocket flights. this study hypothesizes that rockets with a smoother surface
will experience less drag and reach higher altitudes, given the same thrust as rockets
with rough surfaces. to test this hypothesis, three identical model rockets were
constructed and given finishes with varying degrees of surface smoothness: roughed with
40 - grit sandpaper, unfinished, and glossed. each rocket was outfitted with b5 - 4 motors
and flown ten times. flight results support the initial hypothesis, with the roughened -
surface rocket reaching the apogee point at the lowest altitude and the glossed - surface
rocket reaching it at the highest. in conclusion, the findings suggest that smoother
surface finishes can reduce the drag force enough to affect altitude, thereby potentially
increasing rocket efficiency and reducing fuel costs.
who is the primary audience?
people concerned about the price of gas
model rocket hobbyists
academics in the field of engineering
high school math students

Explanation:

The text describes a study on how surface smoothness affects rocket altitude. The key is to identify the group most interested in the study's implications. Model rocket hobbyists would care about altitude (a main goal in their hobby), academics in engineering might be interested in the principles but it's more of a general field, high - school math students are less relevant as the focus is on rocket performance, and people concerned about gas prices are off - topic.

Answer:

model rocket hobbyists