One problem is that bodily waste is a delicate topic, so delicate that culture can be as much a factor in affecting change as necessity. Consider the words: defecate, poop and pee. They're not accepted in polite conversation, are they? We keep our bodily functions under wraps, so any ...
As an example, elements in Group 8A (or VIIIA) all have a full set of eight electrons in the highest-energy orbital, chemist William Reusch wrote on his webpage atMichigan State University. Elements that occupy the same column on the periodic table (called a "group") have identical valenc...
Alpha particles, beta particles, neutrons, gamma rays and cosmic rays are all known as ionizing radiation, meaning that when these rays interact with an atom they can knock off an orbital electron. The loss of an electron can cause problems, including everything from cell death to genetic muta...
Orbital mechanics Micrometeorites and space debris Cosmic and solar radiation The logistics of having restroom facilities in a weightless environment But the biggest problem of all is harnessing enough energy simply to get a spaceship off the ground. That is where rocket engines come in. Rocket Ima...
OrbitalorPalmsander (or steel wool if you have neither) Empty bucket Wood stain Safety goggles Spray bottle filled with water Clean rags Step I: Removing the Stain The first step to fixing a bad stain job is to remove the existing stain from the wood. ...
Yes, Bill Gates owns a lot of farmland (fun fact – go to DuckDuckGo and type “How much farmland”, and it autocompletes to “How much farmland does Bill Gates own” :P). But he only owns a little over a quarter of a million acres. There are roughly 900 million acres of farmland...
However, it does not matter since the Coulomb potential is exactly solvable and, therefore, its semi-classical electron energy spectrum perfectly coincides with the exact one. As for the next element, helium He, mentioned criterion is satisfied much better. For francium atom Fr with largest ...
Some might find it ironic that an organization like NASA, who studies our atmosphere, is ok with rockets polluting it so much. Or isn’t it weird that Elon Musk, the same person who is pushing sustainable energy with Tesla also has a rocket company that
The easiest way to take care of large, flat surfaces is with an orbital sander. Fit the correct sanding disk on the end of the sander, then begin working along the wood’s grain. Hold the sander steady with a light but firm amount of pressure. Move slowly, as in no more than 1 in...
and bone mass in space is to exercise frequently. You'll exercise as much as two hours every day on various machines (treadmill, rowing machine, bicycle). You have to be restrained during your exercise, usually by tension-producing straps, such as bungee cords, that hold you to the ...