# Tag Info

0

The strong force is also known as the color force which holds quarks together by exchanging gluons. The force that holds protons and neutrons together can also be called the residual color force. Other names I've also heard are residual nuclear force and residual strong force. http://hyperphysics.phy-astr.gsu.edu/hbase/forces/funfor.html#c2 ps. some ...

1

Specific charge is indeed the ratio of charge and mass, but since an atom is made up of neutrals and charged particles, you need to account for them. Thus, you'd use $$\eta=\frac{q\left(n_p-n_e\right)}{n_pm_p + n_nm_n + n_em_e}$$ where $\eta$ is the specific charge (my own variable, don't believe it's standard), $m_i$ is the mass of $i$ (neutrons, ...

1

For example, how many quarks are in my brain(easy to find out once you know how many atoms there are)? Actually it's easier to count how many atoms are in your brain than how many quarks are in your brain. As you may know there are three quarks per nucleon in your brain... but this is not the whole truth. The force the binds quarks together creates a ...

0

I want to add some simple comments to David Z's and Nanite's answers, particularly a quantification of David's last paragraph, and his last paragraph is not only to do with "destruction" of the sample with a high energy probe, but also with the stronger and stronger "observer" effect that goes with the use of higher and higher energies. Recall the equation ...

2

As far as resolution goes, right now the best in practice are high resolution transmission electron microscopy (which involves firing high energy electrons), high resolution scanning force microscopy (which involves a very sharp tip vibrating above a surface), and the classic scanning tunneling microscopy (which involves conduction through a very narrow ...

3

A nanoscope in the sense you're talking about would be physically impossible, because things which are smaller than the wavelength of light don't reflect light. They do scatter light, but that's a different process which doesn't form a coherent image. Visible light has wavelengths between about 400 and 700 nanometers, so anything smaller than that - ...

Top 50 recent answers are included