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?
high school math students
people concerned about the price
of gas
model rocket hobbyists
academics in the field of
engineering

Explanation:

The abstract discusses a study on rocket surface smoothness, drag, and altitude—topics related to engineering principles of aerodynamics and rocket efficiency. High school math students are unrelated; gas price concerns focus on fuel costs not rocket design; model rocket hobbyists may not need academic study findings. Academics in engineering would engage with such research on aerodynamic performance and cost reduction for rockets.

Answer:

academics in the field of engineering