Baluncore's latest activity

Is the coffee problem different to stirring paint in an open can ?

Maybe, you need a semicircular plate, attached to a rod that is on the axis of the circle. Push it down, rotate the stick and lift it up...

It comes down to the two different meanings of the term "vector", which in computing, can refer to both a 1D array of many elements, or...

We cannot take our hard-won knowledge with us when we go, so we entrust it to PF, to pass on. We leave it here so google can index it...

It takes time, you cannot get that understanding quickly. Start by following every relevant link on Wikipedia and look at the references...

Extrapolation, in the presence of the butterfly effect, makes for an interesting fictional story. What prediction would you like on the...

I think long term storage gives chemistry time to work. Following the condensation of moisture, adsorption onto the internal surfaces...

The piston pump valve requires a pressure difference to lift it. That pressure drop reduces the depth of the vacuum that can be pulled...

A piston pump with pressure operated check valves will not do as well as a vane or an external gear pump.

A piston pump needs valves, a gear pump does not. If the valves are spring loaded, one way check valves, they will reduce the vacuum you...

That is still unpublished, but in production, where did you find a copy ?

Knowing the exact frequency will not resolve the problem. You must get hands on, and experiment.

Welcome to PF. The answer will depend on the required pressure and the volume that must be evacuated. The best pump will be the one...

Use the "I dislike this", thumb down, every time you see them post. It has had a corrective effect on what is offered to me.

I don't think it is the size of the ant that matters. Here in Tasmania, we have those nervous little jack jumper ants. Their venom...