Via the microstructures and mechanical properties analysis,the results indicate that the ingots of super light Mg-12wt%Li-1wt%Al as-cast alloy cast successfully in the condition of 300 ℃ mould temperature has the better casting microstructures and properties;
The ingots of ultralight Mg-4 16wt%(α phase),8.2%wt%(α+β phase),10.8 wt% Li(β phase) allots have been melted and cast successfully by means of lithium flux cover and argon protection in electric resisternce furnace The ingots,after they are homogenized,are rolled at 200℃,300℃,400℃respectively and the relationship of rolling temperature,lithium content with rolling dege cracks are investigate.
Super-light sound violates causality, causality violations lead to logical paradoxies, so superluminal density regions should be regions of anomal dispersion.
The transition time from a free expansion to a shock wave stage suggests that the super-light expansion observed in extragalactic radio sources has no spherical geometry but must be confined to a narrow cone.
The hazards of light and ultra-light cigarettes tend to be underestimated, whereas the only safe cigarette is the non-smoked one.
The nicotine absorption/nicotine yield and the CO absorption/CO yield ratios were similar for Next and the habitual cigarettes, but about twofold higher for the ultra-light cigarettes.
Emphasis is put on the necessity of an accurate modelling of the detector window, in order to be able to calculate reliably the efficiency of detection, mainly for the ultra-light elements.
It is shown that some hypotheses such as the continuity of the fluorescence yield with the atomic number, which are currently accepted for heavier elements, could be wrong in the field of ultra-light elements.
In addition ultra-light scalar fields could also give rise to a Universe which is accelerating driven by a time dependent Λ-term induced by the scalar field potential.