How do dimples on a golf ball reduce form drag?
A. produce a turbulent boundary layer
B. produce a laminar boundary layer
C. both A and B
D. dimples do not reduce form drag
A. produce a turbulent boundary layer
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The process of growing old is called ________.
Fill in the blank(s) with the appropriate word(s).
The __________ is the loss of uterine tissue at the end of the menstrual cycle
Fill in the blank with the correct word.
List 4 types of foods mice and rats eat
What will be an ideal response?
Astronauts in zero gravity are able to move food through their digestive tracts because
A. smooth muscle produces waves of contractions that propel material through the digestive tract. B. striated muscle creates a pressure gradient that forces material from one end of the digestive tract to the other. C. skeletal muscle puts pressure on the digestive tract. D. cardiac muscle maintains a high pressure that moves material through the digestive tract. E. skeletal muscle sphincters contract and allow materials to move through the digestive tract.