A 127-year-old physics riddle solved

Phys .Org ^ | 21 Aug 2019 | Norwegian University of Science and Technology

[DUMBGRUNT]

Soon Mr Musk will incorporate this and increase miles traveled on a charging.

[taterjay]

Oh no, settled science is being messed with again.

[BitWielder1]

This problem kept me awake at night.

[rdl6989]

“Fuel consumption can double if the vessel is traveling downstream compared to upstream,” Ellingsen said.

Huh?

[Bob434]

Finally, FINALLY! I can sleep- Phew- i was getting exhausted-

[rightwingcrazy]

“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.

[for-q-clinton]

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.

[Lazamataz]

“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.

Q: How many Germans does it take to change a light bulb?

A: One.

#GermansArentFunny

[dfwgator]

How many licks does it take to get to the middle of a Tootsie Pop?

[ProtectOurFreedom]

"Seeing the [wake] pictures appear on the computer screen was the best day at work I've ever had," says Simen Ådnøy Ellingsen

Whatever floats your boat, Simen.

[Augie]

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

[simpson96]

Because “grant money”.

[EQAndyBuzz]

“How many licks does it take to get to the middle of a Tootsie Pop?”

Three

[dfwgator]

The Owl cheated.

[Dr. Sivana]

It took the genius of people like Cauchy, Poisson and Kelvin to solve these wave problems for the first time

It figures that someone with a name like poisson would no something about things moving in the water.

[Leaning Right]

> 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.

[LibWhacker]

Wow, never heard of this riddle before, thanks.

[left that other site]

But Capt'n

[bankwalker]

If a man drank a quart of buttermilk before he started ...
and ran a mile before he farted ...
and the faster he runs the farther he gets ...
how far will he run before he sh!ts?

[William Tell]

"I can’t believe this was an issue."

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.