Recent content by Vagn

At higher doping concentrations you typically get reduced mobilities due to ionized impurity scattering.

The manuscript is available here with open access.

This is already part of the definition of a dwarf planet. "(1) A planet is a celestial body that (a)is in orbit around the Sun, (b)has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c)has cleared the...

It's a property of lead rather than a property of the concrete. Have a look at the cross-section per unit mass of lead below, and compare it to the same for concrete: Lead has an elemental absorption edge at around 88keV, so the cross-section for lead is massively increased when the photon...

Have a look at the Meteorite Identification page from Portland State University and a similar page from UNM. Meteorites are typically not round. The rocks in both pictures look very rounded, which is more typical of Earth-based erosion. The fact that several appeared in the same rock makes it...

You still have the angular part to consider though (i.e. the equipotential lines are more dense off to the side of the capacitor than directly behind it. Other things to consider would be if the fringe fields would result in a net field between the oppositely charged plates of capacitor 1 and 2...

In reality you have the fringe fields, because the plates are not infinite, which in this case shouldn't be neglected. Instead you end up with equipotentials that look somewhat like the following:

I think you are neglecting the electric field outside the capacitor plates. So although released at an initial kinetic energy, the kinetic energy as it passes through the first plate would be less as it feels the field due to the first plate. It is then accelerated whilst in the capacitor, but...

You might want to look up something called the mean-free path (MFP), which is the average distance a molecule or particle travels between collisions. For air, in typical atmospheric conditions, this turns out to be 65-66 nm.

"Whereas only the Oxyphotobacteria can perform photosynthesis, there are members from all three cyanobacterial classes that are capable of aerobic respiration." From Soo et al.

Active galactic nuclei are thought to be powered by the accretion of dust and gas onto the supermassive black hole at the galactic centre.

As in the above reply, Hysol 1C is a good adhesive for vacuum, and is very similar in its properties to Torrseal. NASA also has a database which gives the outgassing properties of many different epoxies.

Isn't that basically the same as a weaponised version of a nuclear propulsion rocket as in Project Orion?

Samsung do both, they have collaborations with Academic and Universities, and their own R&D facilities. The best place to look for careers is probably Samsung's site.

What do you mean by the 'nature' of the surface? Do you mean the elemental composition, the conducting/semiconducting/insulating nature of the material, the effect of adsorbed layers on the surface?