Recent content by Janus

Given that this type of engine have about twice the exhaust velocity of the Shuttle's main engines, then if you were able to substitute, then about twice as fast as given above.

To reach Alpha Centauri in 100 years, you would need to reach a speed of least 0.043 c (12900000 meters/sec) Given the exhaust velocity of even the main shuttle engines, this works out to e^2931 kg of fuel per kg of payload mass.( here e is Euler's number) This is more mass than contained by the...

For simplicity's sake, we will assume a shuttle in orbit with a fully fueled external tank. IOW, we won't factor in the Solid fuel boosters. The Shuttle itself has a mass of 75,000 kg. The external tank has a empty mass of 35,500 kg and holds 718,500 kg of fuel and oxidizer. This puts the...

While Finnish does have words for "yes" and "no" It also does something similar. So for example, The question Maalaatko taulua?" ( Are you painting a picture?) is answered with "Maalaan"( I am painting)

The word "Sisu" in Finnish comes to mind. One attempt that tries to define it goes like this " Extraordinary determination, courage and resoluteness in the face of extreme adversity. An action mindset which enables individuals to see beyond their present limitations and into what might be...

Of course, now you inspired me to do a more physics engine driven example. In this animation, the boxes actually constrain the cylinder using rigid body physic, then the path is traced out using geometry nodes. I didn't do a figure eight, but just basically gave the boxes some random motions...

Since the original animation was just to show the basic idea, I didn't include those types of restraints as it would be simple to do something like this instead to keep the bars oriented.

The top one was done using armatures, which act like a chain of bones, in this case, 2 bones. The base of the chain is parented to the smaller gear so it follows it as it rotates. the other end of the chain is parented to an "empty" (essentially an invisible placeholder for an object). and that...

While a postulate is not a fact, it we can make predictions as what would happen if it were true. This, in turn allows us to devise real life experiment to test whether these predictions hold, and whether or not the postulate is valid. To date, all real life observations align with this...

A problem that arises when is comes to languages that are not native to you is that, not only do they have sounds that can be hard to properly form, they are sometimes even hard for your ear to distinguish, so you even hear it as the nearest equivalent in your language.

Yes, done with Blender.

Two methods I came up with from tracing out figure 8s. The first produces a somewhat uneven one as is, but you can slightly adjust the shape by fiddling with the lengths of the Arms at bit, and might get something better. The second method produces a more symmetrical path. It's overall...

We had my daughter and her partner over for dinner last night and had the TV tuned to a channel that was playing Christmas music on in the background. This is one of the songs they played.

The basic idea for the SOL in a vacuum is that it is invariant. Its speed relative to you as measured by you is always the same. So in the case of Doppler shift, this results in a different equation than one for sound. For sound, you use the form of (Vm±Vr)/(Vm±Vs), where Vm is the speed...