2006-07-02 09:57:06 · 4 answers · asked by toyetomato 1 in Science & Mathematics ➔ Physics
You'll need something like a laser interferometer to measure the motion of the liquid; after that, the Doppler principle applies.
What you'll be measuring is the displacement of the molecules that constitute the fluid, which correlates to the speed at which the pressure wave travels through the water -- which is, in any practical sense, the same as the speed of sound in that liquid.
The everyday corollary to this is LIDAR used frequently by "law enforcement" to identify (obviously, VERY much subsonic) speeding vehicles and to assist in the characterization of the speeding offense. Something similar is often used in "tractor pull" contests to measure the respective distances attained by competitors.
2006-07-02 10:09:09 · answer #1 · answered by wireflight 4 · 0⤊ 0⤋
*Chuckles* Ask the US Navy or better yet, the Brittish Navy. They've had submarines now for over 100 years, and the speed of sound is measured all the time. It depends on the density/salinity of the water and all sorts of other propertys- such as depth, interference from objects (Rocks, whales, etc) I'd ask them, they know
2006-07-09 09:42:54 · answer #2 · answered by Anonymous · 0⤊ 0⤋
get 3 things...
bucket of water
flashlight
speed gun
Hope this helps!
2006-07-02 10:03:59 · answer #3 · answered by Isles1015 4 · 0⤊ 0⤋
GOT MILK?
2006-07-02 10:50:32 · answer #4 · answered by mitchskram 3 · 0⤊ 0⤋