全部文献期刊会议图书|学者科研项目
中外文文献  中文文献  外文文献
作者:Susan M. Renner , Daniel D. Schwert
来源:[J].The Physics Teacher, 2019, Vol.57 (9)AAPT
摘要:We devised an activity to explore friction by testing some of the common theories on how ancient Egyptians moved the stones used to build the pyramids. The activity is suitable for a high school physics course or introductory college courses for both science majors and non-scienc...
作者:Daniel D. Schwert , Julian A. Davies , Nicholas Richardson
来源:[B].Topics in Current Chemistry2002Springer
摘要:Abstract Contrast agents for magnetic resonance imaging based on metal ions other than gadolinium(III) including manganese(II), manganese(III), iron(III) and copper(II), have been investigated over the past decade. Although the intrinsic properties of these metal ions ...

我们正在为您处理中,这可能需要一些时间,请稍等。

资源合作:cnki.scholar@cnki.net, +86-10-82896619   意见反馈:scholar@cnki.net

×