A 1/20 scale model of a wing is used to determine forces on the actual airplane. the 1/20 scale refers to the:_____

a. lengths.
b. velocity.
c. forces.
d. Reynolds number.
e. all of the above.

The scale can be said to be a representation of the model as regards the prototype. The prototype is the machine. Using a 1:20 scale tells us that the model is 1/20 times the magnitude of the length of this machine. So if the length of the side of the machine = 20m then we would have the length of the model as 1. (1/20x20 = 1)

Therefore the scale is the length and option a is correct

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A 1/20 scale model of a wing is used to determine forces on the actual airplane. the 1/20 scale refers to the:_____ a. lengths. b. velocity. c. forces. d. Reynolds number. e. all of the above.

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A 1/20 scale model of a wing is used to determine forces on the actual airplane. the 1/20 scale refers to the:_____

a. lengths.
b. velocity.
c. forces.
d. Reynolds number.
e. all of the above.