Recent content by some bloke

Hey everyone! I'm a keen D&D-er and one of the unexplored regions of the planar map is the elemental plane of water. There's a few handwavey explanations of it, but I want to make it into an entire setting. As much as one can on an infinite plane of water without a defined gravity field, I...

I believe that the moon doesn't get hit that often, I think (and I could be wrong) that it just doesn't have any way to recover from impact - no weather to erode, no life to grow. So we're seeing a complete history of when the moon got hit by rocks. If there were significant risk of meteoric...

I hypothesise that with the majority of the ocean being non-coastal, it would benefit most from the balls being arranged in a hexagonal grid, consisting of rows which are offset by r for each row, allowing them to pack into a hexagonal arrangement, in the same way as honeycomb. I can see what...

If I were to try and create a system which guarantees power for a moon-base, I would look at building a rail system around the moon on which to transport solar panels. The moon has an equatorial circumference of 10917km, and rotates once every 29.5 days, which equates to just under 15.5km/h, to...

Regarding the available resources, I found an estimate that 12.33 billion tennis balls have been produced since they were invented. By my calculations (which I now doubt due to not accounting for the balls being in the way of the displaced water) this would raise the ocean by 0.00197mm.

The hexagons (Assuming they were kept vertical by neigbouring hexagons) would displace almost a meter-tall column of water, but it would be the space that it occupies. Are you saying that I need to make some relation between the water displaced upwards and the volume occupied by the ball itself...

Hello all, I indulged myself a curiosity today on the question of how much the sea levels would rise if we covered them with tennis balls. (Don't ask why, because I don't know!) Here's the rough breakdown of my calculations and assumptions: 1: Tennis balls are, on average, 6.7cm (0.067m) in...

I was meaning that my experience with servo motors tends towards them driving to an absolute position and then doing their darndest to not let that move! Chances are this is more to do with how they are used in my workplace rather than their full capabilities. So if I have a ball-screw run off...

I'm afraid I don't know the exact values just yet, but my experience with DC servo motors was that they were fairly absolute. Would it damage one if the load on the servo was pushing it back against the direction it was pushing? Load will probably be around 50-300kg (variable during operation)...

Without going into too much detail, I have a project which I am considering my options for, and one design would have potential if I can find some sort of force-based linear actuator. I suspect that there might be some sort of magnetic-based system out there which operates on a changing...

The symmetrical die produces curved pasta bacause the dough being pushed out at the edges of the barrel is moving slower than the dough in the centre. The dough is pushed out via the middle, which drages the next "ring" of dough, which drags the next, all the way to the outside edge where the...

Relativistic motion and time dilation has been of interest to me for a long time, and whilst I am asking this for realism in writing a piece of fiction, I am curious as to how this interaction would work. Let's say there's a large dyson ring built around earth, which is spun up such that the...

Ididn't get it at first, then I started breaking it down. I often find breaking the movements down, sort of like addition of vectors, works for my mind!

Thank you all so much, I feel confident that I've got this one right, though I will still be checking with my tutor tomorrow as I'm certain this was not covered in our lessons, and I want to make sure that I'm not expected to demonstrate a different method!

Ok, I agree on the height at S=0.022 as 0.0003m. From that I worked out that a constant equal to the total energy multiplied by mass was equal to 1/2v^2 plus gh, which gave a value of 0.983*m. Then to get maximum height (where Ek is 0) I have mgh=0.983m, thus gh=0.983, so h=0.983/9.81, which...