Recent content by jack action

With AI, LLM in particular, the ingenuity of humans is just transferred to making good prompts. For example: Also, look into AI prompt engineering:

It is not surprising when you know there is a list of animals in political office on Wikipedia. Even foot powder has been elected once: But you might also be interested in AI Steve who was a candidate in a UK election in 2024. It finished last of eight candidates with 179 votes, a share of 0.3%.

Today I learned Dream On was a cover by Helix, originally done by Nazareth:

Your numbers seem to come from behind the impeller tip, where it would be normal to have a low-pressure area as the impeller turns. But even at this point, the total pressure seem to be 133 000 Pa rather than 106 000 Pa. (Which sets the static pressure a little above the atmospheric pressure.)...

From the isentropic process: $$\frac{p}{p_t} = \left(\frac{T}{T_t}\right)^{\frac{\gamma}{\gamma - 1}}$$ and from the definition of total enthalpy ##h_t##: $$h_t = h + \frac{v^2}{2}$$ knowing that ##h_t = C_pT_t## and ##h = C_pT##, we get: $$\frac{T}{T_t} = 1 - \frac{v^2}{2C_pT_t}$$ And, since...

If both engines are identical and have the same peak power, it can be assumed that the turbo is bypassed at high rpms. Therefore, the turbo only kicks-in during low rpms, thus increasing the overall power band compared to the naturally-aspirated engine. A turbocharger can work just as well on a...

In a compressible flow, "gauge" total pressure doesn't really make any sense. With incompressible flow, total pressure is an addition: $$p_{total_{abs}} = p_{static_{abs}}+½\rho v^2$$ So: $$(p_{total_{gauge}} + p_{atm}) = (p_{static_{gauge}} + p_{atm}) + ½\rho v^2$$ Therefore the equation works...

Use the isentropic nozzle flow equations which consider compressibility effects.

Hearing my wife's painful screams during labor, I asked: "What's up?" Her reply: "These contractions are killing me!" To show that I heard her, I then asked: "What is up?"

Say, your horse needs to eat 1 kg of hay (that's where it gets its energy) every 60 m it pulls the 1000 N weight. If it goes at 1 m/s, every 1 minute the horse will have to eat its 1 kg of hay. After 1 hour, it will have covered 3600 m and have eaten 60 kg of hay. So 60 kg of hay per hour is...

In the word "two", there is nothing about how the concept of "two" can be written some other way, such as a number - in any form you like - or as "deux" in French. Unless someone finds me a source stating otherwise, "two" represents a quantity twice the unit: ##.## -> "one" dot ##..## -> "two"...

Sorry to be late to the party, but ... Do you have a source for that? I can't seem to find one. How would you pronounce ##LXXXI## in Roman numerals? Would you convert this Roman number to decimal in your head or just read off the letters from left to right? I read "eighty-one", not...

I think I found the perfect word: rout. So it applies to wild animals (particularly, a rout of wolves) and to groups of people (particularly, lawless ones), fitting perfectly with a group living before the invention of civilisation.

I put the OP in ChatGPT and got this: