Ratio of mean free path to characteristic length is called as _________
A. Mach number
B. Knudsen number
C. Nusselt number
D. None
Answer:A
Ratio of mean free path to characteristic length is called as _________
A. Mach number B. Knudsen number C. Nusselt number D. None
Explanation: Ratio of mean free path to characteristic length is called Knudsen number. Nusselt number is used in heat transfer.