But Capt'n
Posted on 08/22/2019 11:41:34 AM PDT by DUMBGRUNT
"Seeing the pictures appear on the computer screen was the best day at work I've ever had," says Simen Ådnøy Ellingsen, an associate professor at NTNU's Department of Energy and Process Engineering.
39 degrees It has long been assumed that the angle of the v-shaped wake behind a boat should always be just below 39 degrees, as long as the water isn't too shallow. Regardless whether it's behind a supertanker or a duck, this should always be true. Or not. For like so many accepted facts, this turns out to be wrong, or at least not always the case. Ellingsen showed this.
Boat wakes can actually have a completely different angle under certain circumstances, and can even be off-centered with respect to the direction of the boat.
(Excerpt) Read more at phys.org ...
Oh no, settled science is being messed with again.
“Fuel consumption can double if the vessel is traveling downstream compared to upstream,” Ellingsen said.
Huh?
Finally, FINALLY! I can sleep- Phew- i was getting exhausted-
“Physics Riddle”
Q: How many theoretical physicists does it take to change a light bulb?
A: Two. One to hold the bulb and one to rotate space.
I can’t believe this was an issue. They just now figured out that currents can impact the wave. I must be missing something but this sounds too basic based on what I just read. Maybe the author doesn’t really understand what he wrote about so it’s not clear.
Q: How many Germans does it take to change a light bulb?
A: One.
#GermansArentFunny
How many licks does it take to get to the middle of a Tootsie Pop?
Whatever floats your boat, Simen.
Oh good grief. Anyone that has spent even the slightest amount of time on the water would recognize those simple facts. But, it took an associate professor and two students to prove it?
PhD = Piled Higher and Deeper
Because “grant money”.
“How many licks does it take to get to the middle of a Tootsie Pop?”
Three
The Owl cheated.
> It has long been assumed that the angle of the v-shaped wake behind a boat should always be just below 39 degrees <
I have been working on this problem unsuccessfully for years. And just now I understand where I went wrong. I was studying the wake behind a boot.
Wow, never heard of this riddle before, thanks.
From my recollection, the famous Michelson-Morley experiment was designed to detect the "medium" through which light waves move in a vacuum. If the earth was moving through such a medium, then the measured speed of light would depend upon which direction the light was moving relative to the direction of earth's movement.
Much to the surprise of many, there was no detected change in the speed of light despite the known movements of the earth.
The expectation that there had to be a "medium" in which light waves occur was consistent with many physical wave phenomena including waves in water. For this reason, I too would be surprised to hear that wave behavior in moving water would be unstudied until now.
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