A museum of science plans an experiment to demonstrate a feather falling through a vertical glass vacuum tube. The fall time from rest should be about $0.5\ \text{s}$. How long should the tube be?
- A$1.3\ \text{m}$
- B$2.5\ \text{m}$
- C$5.0\ \text{m}$
- D$10.0\ \text{m}$