Recent content by potatoecannon

While I'm not that familiar with "sorp-ing?" film, I do know that dropping 49 atmospheres of CO2 in a couple seconds will not stay at room temp... hopefully this is okay for your process. An autoclave might be adapted to your purposes...

I believe O Goest was saying that you would reach through the open ball valve's oriface to remove your object.

This is the kind of fundamental question that really irritates high-school students when they are first told that carrying a box does no work, while lifting it does. Try to think of it another way. The goal is to levetate an object. The method chosen to do so will have the largest effect...

If you have a thread running through both pieces, the threads must line up when it is tightened. This is due to the continuous thread on the fastener (bolt or screw). If the parts aren't clamped together when you tapp the holes, there will be a gap (less than 1 thread spacing) when...

Lots of good comments here. I'll take a stab at simplifying/summarizing: Looking at the bike in a static setup (not moving), gravity will try to pull it down the ramp with the force of mass*gravity*sin(angle). Since the only other force perpendicular to the surface is the friction from...

I believe dissolved oxygen works slightly differently than the vapour partial pressure. While I agree (& thank you for looking up the value) that you wouldn't be forming a large vapour bubble (essentially room temperature steam) for a short tube, I still think an air bubble may form (albiet...

That aquarium idea does sound quite interesting. I wonder though, with the water column (tube-arch) constantly drawing a negative (gauge) pressure, would it do as you said & cause the dissolved oxygen in the water to come out here? That would cause an air bubble to form, slowly displacing...

I can think of two examples: 1) Using high explosives (ie Nuclear Bomb ignition) 2) Using high energy lasers to detonate the surface of a fuel pellet (ie Fusion research) If you have a particular application in mind it might be easier to come up with something more practical?

One more note (if you pick this project back up again): Batteries do not like to be run from full charge to full discharge - you will kill them rather quickly (unless you shell out for "deep-cycle" batteries). Something to keep in mind.

I believe you may have confused series/parallel there: if the voltages add AND the current capacities add, then total energy availe would have gone up by 9 for 3 batteries... In series, each battery will still only supply 40 amp-hours, and the voltages stack. If you ran the batteries in...

Yes, you would need 2 of them at a fixed distance apart within the object. An easier solution is a 6dof sensor; using 3 accelerometers & 3 gyros to capture all 6 values.

My thoughts are that: 1) Yes the graph is inverted (up is in direction of decreasing x). 2) The graph is from a video of only the launch, due to the 1/3 seconds & large # (units?) of acceleration. 3) The graph is a good fit for the points plotted (lower-left corner gives the calculated...

Braking distance (&time) is typically limited by your coefficient of STATIC friction between the tires & the road. The brakes are capable of generating more frictional force than the tires, resulting in the wheels locking up. Locked tires then SLIDE down the road, resulting in less friction...

Was there much horizontal movement in the launch? That will skew your (vertical-only based) calculations. The SUVAT equation model is for constant acceleration, which you will not have in this case. It would be an approximation, though it might still be sufficient for you. You need a...

Alright sorry but I just wanted to check, since it's in the engineering section (instead of general physics). There's nothing really to add; you seem to know the math pretty well & derived the correct equation. It may have been slightly more confusing due to setting up a left-handed...