European History


Does J.S. Mill’s On Liberty or Marx and Engels’s Communist Manifesto offer a better solution for the problems facing Europe in the

mid-nineteenth century?

READ ALSO :   An x-ray beam of a certain wavelength is incident on a NaCl crystal, at 30.0° to a certain family of reflecting planes of spacing 39.8 pm. If the reflection from those planes is of the first order, what is the wavelength of the x rays?