Assuming mass does not also increase, then density decreases if volume increases. For example, let's say Mass= 100 and Volume= 50 Density would = 2 Now, lets increase the voluâ¦me. Mass would still = 100, and let's increase the volume to 75. Density would then equal 1.333... 2 is greater than 1.333....
Definition of wind tunnel. : a tunnellike passage through which air is blown at a known velocity to investigate air flow around an object (such as an airplane part or model) placed in the passage.
NASA wind tunnels are often designated by the cross-sectional dimensions of the test section. The wind tunnel in the lower center of the figure is the NASA Glenn 10 x 10. whose test section is 10 foot high and 10 foot across. At the lower left is the NASA Ames 80 x 120, which is a full scale, low speed wind tunnel.