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  2. Atom - Wikipedia

    en.wikipedia.org/wiki/Atom

    Other exotic atoms have been created by replacing one of the protons, neutrons or electrons with other particles that have the same charge. For example, an electron can be replaced by a more massive muon, forming a muonic atom. These types of atoms can be used to test fundamental predictions of physics. [147] [148] [149]

  3. Cat state - Wikipedia

    en.wikipedia.org/wiki/Cat_state

    For a given well-separated cat state (|α| > 2), an absorption of 1/|α| 2 is sufficient to convert the cat state to a nearly equal mixture of even and odd cat states. [24] For example, with α = 10, i.e., ~100 photons, an absorption of just 1% will convert an even cat state to be 57%/43% even/odd, even though this reduces the coherent ...

  4. Composition of the human body - Wikipedia

    en.wikipedia.org/wiki/Composition_of_the_human_body

    Parts-per-million cube of relative abundance by mass of elements in an average adult human body down to 1 ppm. About 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium ...

  5. Molecular model - Wikipedia

    en.wikipedia.org/wiki/Molecular_model

    The construction of physical models is often a creative act, and many bespoke examples have been carefully created in the workshops of science departments. There is a very wide range of approaches to physical modeling, including ball-and-stick models available for purchase commercially, to molecular models created using 3D printers. The main ...

  6. Atomic physics - Wikipedia

    en.wikipedia.org/wiki/Atomic_physics

    While modelling atoms in isolation may not seem realistic, if one considers atoms in a gas or plasma then the time-scales for atom-atom interactions are huge in comparison to the atomic processes that are generally considered. This means that the individual atoms can be treated as if each were in isolation, as the vast majority of the time they ...

  7. AOL Mail

    mail.aol.com

    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. Radioactive tracer - Wikipedia

    en.wikipedia.org/wiki/Radioactive_tracer

    A radioactive tracer, radiotracer, or radioactive label is a synthetic derivative of a natural compound in which one or more atoms have been replaced by a radionuclide (a radioactive atom). By virtue of its radioactive decay , it can be used to explore the mechanism of chemical reactions by tracing the path that the radioisotope follows from ...

  9. Coital Alignment Technique: Why This Sex Position Reliably ...

    www.aol.com/news/sex-position-reliably-gets...

    The “coital alignment technique,” aka CAT, is a modified version of missionary sex, where the man rides a little higher, sliding his body up an inch or two so that the base of the penis rubs ...